14 best smoke alarm with photoelectric sensors

Product description

The BRK Model No. 3120B is a wire in, 120V AC 60Hz single and/or multiple station photoelectric and ionization dual sensor smoke alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multifamily dwellings as defined in standard NFPA 101. Model 3120B complies with UL217, CSFM, NFPA 72, HUD, FHA and other agencies that model their codes after the above agencies. It meets building codes where AC/DC photoelectric and ionization combination smoke alarms are required. The BRK 3120B is a state of the art hardwired with battery backup smoke alarm that features dual photoelectric and ionization smoke sensing technologies. This alarm features two latching features and two silence features. Alarm Latch: Easily identifies initiating alarm even after alarm condition has subsided. Low Battery Latch: Identifies which unit is in low battery condition by blinking the green power light. Low Battery Silence: Temporarily silence the low battery chirp for up to eight hours. Alarm Silence: Silence alarm for several minutes. Other features include an85dB horn, single button test/silence, an easy access battery drawer and dust cover. OptiPath 360 Technology: Exclusive patented technology provides 360 degrees of direct access to the smoke sensor. Two locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a Quick Connect wiring harness. Installation is quick, easy and cost effective.

• Hardwired alarm includes battery backup for power outages
• Photoelectric and ionization sensors provide comprehensive fire detection
• A single button makes alarm easy to test monthly or silence during a false alarm. Temperature Range: 40°F (4°C) to 100°F (38°C)
• Two latching features help indicate a low battery or the originating alarm in a system
• Optipath 360 patented technology provides 360 degrees of access to the smoke alarm. Emits T3 Pattern
• Equipped with a dual photoelectric and ionization smoke sensor to quickly detect both fast burning and smoldering fires
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
• Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

User questions & answers

Question:	My entire home is equipped with BRK smoke detector (4120 B) and Carbon Monox Det (CO50120B). They need replacing. Will new BRK fit extant casings
Answer:	Actually it’s pretty easy to put together.i didn’t use the instructions
Question:	can these be connected together so if one is set off they all go off
Answer:	Mine was all there not sure
Question:	How does the Alarm Latch feature "easily identify initiating alarm"? This is major problem with false alarms on my existing Kidde/Firex dual alarms
Answer:	My mattress is slightly smaller than frame but I have placed 2 yoga mats under mattress and that stopped all slipping. Really like platform bed for the price.
Question:	Can a BRK Model 92120B smoke detector directly plug in and replace an old BRK Model 4120B smoke detector (without an adapter
Answer:	I don't think so, unless you glue them. Too much padding.

Product features

Smoke Alarms

Place at least 10 feet from kitchen/stove, and on the ceiling or high on a wall, no more than 10 inches from top.

Carbon Monoxide Alarms

Carbon monoxide alarms can be placed anywhere, not just the ceiling or high on a wall. They should be replaced every 5 to 7 years.

Fire Extinguishers

Keep in the kitchen and garage, but make sure to have the right grade for the type of fire that might occur.

Escape Ladders

Have at least one if your home has more than one story. Each room needs 2 escape routes; in most bedrooms it's the window, so have a ladder nearby.

Product description

The First Alert BRK 7010B hardwire photoelectric smoke alarm with battery backup is a hardwire 120V single or multiple station smoke alarm designed for residential home use and institutional locations such as hospitals, hotels, motels, dormitories and other multiple family dwellings. This alarm is inter-connectable and can be installed and linked with up to 18 compatible devices (up to 12 smoke alarms and 6 compatible devices like bells, horns and repeaters) so that when one triggers, all alarms sound. The First Alert BRK 7010B emits loud 85dB audible alarm. The alarm also features a photoelectric smoke sensor, which is particularly effective at detecting slow smoldering fires. The Frist Alert BRK 7010B hardwire smoke alarm with battery backup is packed with convenient features. The single test/silence button silences a non-threatening alarm or low battery warning; plus allows you to test the unit's functionality quickly. The latching alarm indicator will automatically identify which unit initiated the alarm if alarms are installed in a series – helping identify the initial location and source of an incident. The smoke detector also includes an optional drawer and mounting bracket lock to prevent tampering or removal of the 9-volt battery. End of life signal provides audible notice when the alarm needs to be replaced after 10 years of service. This alarm is backed by a 10 year limited warranty and is tested to meet UL standards 217. Includes smoke alarm, mounting bracket, 9-volt backup battery and user manual.

The BRK hardwire smoke alarm with photoelectric sensor is designed to reduce common "nuisance" alarms. It's an excellent choice for installations in or near kitchens, near fireplaces, or in hallways directly outside bathrooms, utility rooms, or other areas prone to steam. This alarm is also a popular choice for hotel/motel applications.

The 7010B AC-powered smoke alarm with photoelectric sensor includes these features:

• Photoelectric sensor which is more effective at detecting smoldering fires which smolder for hours before bursting into flame.
• 120-volt VAC inter-connectable (with maximum 18 compatible devices). The alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Power indicators show which unit in the series initiated the alarm.
• Quick plug-in power connector for easy installation.
• 9-volt battery backup for peace of mind during power malfunction.
• Alarm indication which in an interconnected system, automatically identifies which unit initiated the alarm.
• Optipath 360 technology allows 360-degree access to the layer of air on the ceiling or wall that carries the fire signatures (smoke, combustion particles and volatile components).
• Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality.
• Locking feature for tamper resistance.
• 10-year limited warranty.

All BRK Electronics smoke alarms meet UL 217 standard and are listed with the California State Fire Marshal. They use the new UL mandated repeating 85-decibel alarm horn pattern. 10-year limited warranty.--Bree Norlander

What's in the Box

One smoke alarm, one 9-volt battery, and user's manual

• 120 volt hardwire smoke alarm with photoelectric sensor and battery backup
• Features convenient 9 volt battery backup, silence/test button, dust cover, 85 decibel alarm
• Inter connectable with BRK and first alert hardwired smoke and carbon monoxide alarms
• Intuitive latching alarm indicator identifies which unit triggered alarm. Backed by 10 year limited warranty and tested to meet UL 217 standards
• 85 decibel alarm
• Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

User questions & answers

Question:	In two places, the description says this unit is red plastic. Is this true
Answer:	They are white with a red plastic dust cover. The red plastic dust cover is for use when you are painting or remodeling to prevent particulates from entering alarm and setting it off.
Question:	The photo for this product indicates that this is a dual alarm (both p and i are shown on front of unit). Just supposed to be just photoelectric
Answer:	Yep, they are showing the wrong picture. This is a photoelectric model only. The dual ion/photoelectric hardwire detector is BRK 3120B. I realize your question is old....I'm answering it for others...
Question:	I have 20 year old First Alert alarms with incompatible wiring. Does this unit come with a new wiring harness to connect to the AC line
Answer:	Yes, this comes with a 3 wire harness that gets hard wired to your existing electrical and connects to the back of the fire alarm. Black and white for power and red to link alarms together. It does not include any adapters so you will need to disconnect the power and replace the existing harness with the one included with the alarm.
Question:	on the back there should be a number like +/- obs ft % or a sensitivity range could you please read the numbers form me please thank you
Answer:	SMOKE SENSITIVITY: 1.18 to 2.83 %/FT. OBS.

Product features

Smoke Alarms

Place at least 10 feet from kitchen/stove, and on the ceiling or high on a wall, no more than 10 inches from top.

Carbon Monoxide Alarms

Carbon monoxide alarms can be placed anywhere, not just the ceiling or high on a wall. They should be replaced every 5 to 7 years.

Fire Extinguishers

Keep in the kitchen and garage, but make sure to have the right grade for the type of fire that might occur.

Escape Ladders

Have at least one if your home has more than one story. Each room needs 2 escape routes; in most bedrooms it's the window, so have a ladder nearby.

Product description

X-Sense 10-year battery smoke alarm (not hardwired), model SD06

• 10-YEAR BATTERY LIFE: Equipped with a sealed 10-year lithium battery for continuous power with no replacement required during the 10-year life of the alarm; eliminates any worry about battery removal or unauthorized deactivation of the alarm
• ACCURATE & RESPONSIVE: Adopts the most advanced photoelectric sensor, enabling the alarm to quickly detect dangerous smoke levels from slow-burning, smoldering fires; provides the earliest possible warning of fire while minimizing false alarms
• SELF ACTIVATION: This alarm will automatically activate when it is installed into the mounting bracket; the TEST/SILENCE button allows you to temporarily silence nuisance alarms, and the silence mode cannot be activated unless the unit is in alarm mode
• AUTO-CHECK FUNCTION: Constantly monitors itself and quickly warns you of faults or a weak battery; clearly informs you of the working status of the alarm with its 85 dB alarm and 3-color flashing LED indicator
• EASY INSTALLATION WITH GUARANTEED QUALITY: Requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs; we provide a 60-day money-back guarantee and a 5-year warranty

User questions & answers

Question:	Does fit right in to the bracket, to replace an existing ceiling smoke alarm
Answer:	That information should be in the product description.
Question:	Is this hardwired or battery power only
Answer:	no
Question:	does this interconnect
Answer:	YES! I love it!!!!
Question:	Is the green light on all the time
Answer:	It's probably best to put a lightweight mattress on it. I have a Serta Perfect Sleeper Eurotop. It is extremely lightweight, very comfortable, and it doesn't add the extra weight that makes the slats on the frame squeak.

Product features

LED Indicator

This alarm uses a 3-color LED indicator (red, green, yellow) combined with the alarm sound, making it easy for you to check the alarm status.

Fewer False Alarms

Adopting advanced photoelectric technology, this alarm ensures more accurate alarms by taking 3 separate smoke samples before alerting, minimizing false alarms to avoid waking you from sleep.

Premium Quality

Made with an upgraded premium PC plastic housing and internal insect-proof stainless-steel mesh, this alarm is fire-retardant, high temperature resistant, and corrosion resistant. Reliability, high quality, and excellent performance maintain the alarm's functionality for 10 years.

Alarm Installation Guides

We recommend that you install a smoke alarm on every floor of your home, in hallways, between the sleeping and living areas, and underneath and in the junction of stairs.

Product description

The First Alert SCO5CN Combination Smoke and Carbon Monoxide Alarm features dual sensors to detect both smoke and carbon monoxide in a single device. A photoelectric sensor detects the smoke most often produced by smoldering fires, and minimizes false alarms from cooking smoke or shower steam. Additionally, the advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel burning appliances, blocked chimneys, and generators running inside or too close to homes. A loud, 85 decibel siren alerts you to the threat; unique alarm sounds and indicator lights on its face distinguish a smoke warning from a carbon monoxide warning. This carbon monoxide and smoke detector is battery operated, so you don't need an electrician for installation. Requiring just two AA batteries and featuring an easy access battery compartment for quick changes, this smoke and carbon monoxide detector has a single button that allows you to silence a false alarm or test the unit.

Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air.

The First Alert SCO5CN carbon monoxide and smoke alarm uses an electrochemical carbon monoxide sensor-the most accurate technology available. The alarm uses photoelectric smoke sensing technology which is environmentally friendlier and which reduces nuisance alarms, making it ideal for cooking areas. It is also great for sensing slow smoldering fires quickly. The permanent sensors last the lifetime of the alarm. The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. A low battery signal alerts you to replace the battery and end-of-life alarm of three chirps alerts you to replace the unit. Two AA batteries are included. 5-year limited warranty. UL listed. Not available for sale in Massachusetts.--Bree Norlander

What's in the Box

One combination carbon monoxide and smoke alarm, two AA batteries, and user's manual. This does not contain voice feature.

• Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
• Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire
• Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection
• Battery operated unit installs quickly and easily without an electrician. Low battery signal mute, quiets low battery signal for up to 8 hours
• Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling
• 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards
• It can ship within the US except New York
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

User questions & answers

Question:	pack is $30, 2 pack is $90. Why is a two pack so much? I thought the idea was to incentivize more product at a lower cost. This is halarious
Answer:	I no longer live in the apartment where I replaced the old smoke alarm, but you will love this one. It's so nice to flip the battery holder down and not have to remove the battery from the unit.
Question:	Advice on false alarms? Goes off every week or so. It's in our kitchen/living room, but goes off even when we are not cooking. Goes 1 min then stops
Answer:	No
Question:	I have these througout my house and rental unit. Installed them about 7 years ago and many malfunctioning. Any durability mprovments since 7 yrs ago
Answer:	The instructions that come with the unit duplicate what I have read from several Fire Department sources: you can place your unit on the ceiling, but AT LEAST 4 inches (10cm) from the wall. If you want to mount it on the wall, mount it MORE THAN 4 inches (10cm) BELOW the ceiling, but NO LOWER than12 inches (30cm) below the ceiling. It has to be high enough up the wall to "smell" the smoke, but that 4 x 4 inch (10cm x 10cm) area where the wall meets the ceiling can sometimes harbor a "dead zone" of still air where the smoke would NOT reach the detector quickly enough during a fire to warn you in time. Thus, do NOT mount your detectors too close to where the wall meets the ceiling.
Question:	How long do batteries last
Answer:	Ionization type. I actually looked at at manual to be certain.

Product description

Technical Specifications

Power supply: 10-year sealed lithium battery

Sensor type: Photoelectric

Product life: About 10 years

Safety standard: UL 217

Smoke sensitivity: 0.97-1.79%/ft OBS

Standby current: < 6 µA (avg.)

Alarm current: < 60 mA (avg.)

Best operating ambient temperature: 40-100 °F (4.4-37.8 °C)

Operating relative humidity: < 85% (non-condensing)

Alarm noise level: ≥ 85 dB at 9.84 ft (3 m) @ 3.2 ± 0.3 kHz pulsing alarm

Alarm silence: ≤ 9 minutes



Product Size

Alarm Unit

Diameter: 5.0 in (127 mm)

Thickness: 1.9 in (48.3 mm)

Weight: 0.56 lbs (254 g)



Mounting Bracket

Diameter: 5.7 in (146 mm)

Thickness: 0.08 in (2 mm)

Weight: 0.11 lbs (50 g)



Package Contents

1 × Alarm Unit

1 × Mounting Bracket

3 × Screws

3 × Anchor Plugs

1 × User Manual

1 × Warranty Card

• LED ESCAPE LIGHT: The X-Sense battery-operated smoke alarm with a safety light provides you and your family with an early warning signal in the event of smoke or fire; the safety light helps guide your way to safety when dense smoke is present
• ACCURATE, RELIABLE, & SENSITIVE: Integrating the most advanced photoelectric sensor, this smoke alarm quickly detects dangerous smoke levels from slow-burning, smoldering fires, and provides the earliest possible warning of fire while minimizing false alarms; monitors day and night, 24/7, keeping you in control of every fire situation
• 10-YEAR BATTERY: Runs on a UL certified industrial-grade battery pack consisting of 2 lithium batteries with a large capacity of 3300 mAh, offering double the energy capacity when compared to other models on the market; provides 10 years of continuous power, saving you from constantly having to change batteries
• AUTO-CHECK FUNCTION: Checks the battery level and sensor status automatically every 10 seconds to ensure that the key sensor and critical circuit are working properly; clearly informs you of the alarm’s working status with its 85 dB alarm and 3-color flashing LED indicator (red, green, yellow)
• ETL CERTIFIED: Rigorously tested to meet the UL 217 Standard executed by Underwriters Laboratories (UL), an authoritative global safety certification company with the largest testing laboratory in the United States; backed by a 60-day money-back guarantee and an after-sales service team to help you resolve any quality issues within 5 years; our lifetime technical support team will respond to you within 24 hours of you reaching out to them

User questions & answers

Question:	what is it made of
Answer:	Yes it is adjustable and quite easy to install - JJ
Question:	does the battery really have a life of 10 years? can it be replaced
Answer:	it worked for our adjustable bed. But it doesnt connect to the frame. We screwed the headboard to the wall and the bed just sits up against. Looks good.
Question:	Why 5 year warranty while they providing a 10-year battery
Answer:	no.
Question:	Does the green LED that indicates normal operation flash continuously or only when the test button is pressed
Answer:	Yes the bed frame comes with it.

• TEST BUTTON & LOW BATTERY SIGNAL: The smoke alarm is easily to test by pressing the button more than 5 seconds. If low battery there will be a signal alarm,which will recall you to change a new battery,then the smoke detectors will work as usual.
• SAFETY CLIP FEATURE: The photoelectric smoke detectors are not allowed mounting without battery install,so don't worry about the fire risk if you forget the battery.
• EASY INSTALL & REPLACEMENT BATTERY: The smoke detector is 9V battery operated,which can be quickly replaced.There 2 expansion screws in the box to help you install the alarm.
• 10 YEARS LIFE TIME: The smoke alarm have 10-year long life(Not the battery life time) with loudly alarm(Loud>85dB) alarm signal at 3 meters,to make the room person can hear the alarm clearly when the smoke alarm is chirping,There will be enough time to leave from the dangerous.
• HOME PROTECTION: Working smoke smoke detector cut the risk of dying in a home fire by 50%, and that's important because a home fire starts every 83 seconds! The faster you realize a fire warning,the more time you can escape from the fire.

User questions & answers

Question:	My question is wheb the only the alarm starts how can i stop it? For now the only way is to remove the battery
Answer:	Yes. The female ends on the jumpers fit.
Question:	Can this be mounted on wall? I have popcorn ceilings and not sure this would install w/ these so trying to find wall mounted
Answer:	Hello my friend, yes, you can put two or more breadboards together to use.
Question:	Are these compatible with; and can these be interconnected with Kidde or First Alert detectors
Answer:	Hello my friend, the jumper wires are made of copper. Thanks.
Question:	Delivery to CA is not
Answer:	Yes, there are several holes at different heights to connect it to a bed frame.

Product features

10 Year Use Time

The battery of GS528A is one year replaceable battery. But the product can be 10 years life time which is longer than other smoke detectors.

Low Battery Warning

If low battery there will be a signal alarm, which will recall you to change a new battery, then the smoke detectors will work as usual.

Easily Install

No hardwired anymore, very convenient to install at home or bedroom - wall mount, screws included.

LED Light

If an alarm occurs, the red ring light will light up which can remind you that something happened.

Techinical Speacifications

Sensor Type: Photoelectirc

Product Life: About 10 years

Best Operating Ambient Temperature:4.4-37.8℃(40-100℉)

Loud>85dB(A)alarm signal@3M

Product description

While all smoke alarms are designed to detect smoke, different sensing technologies react differently to certain types of fires. This alarm makes use of both ionization and photoelectric sensors to offer the earliest possible warning regardless of the type of fire. Sometimes a fire can smolder for hours before erupting into flames. Photoelectric Sensing Technology is more sensitive than Ionization Sensing Technology at detecting these sorts of smoldering fires, like those caused by cigarettes burning in couches or bedding. Other fires erupt into flames quickly, like kitchen grease fires or fires fueled by paper burning in a wastebasket. Ionization Sensing Technology is generally more sensitive than Photoelectric Sensing Technology at detecting these sorts of flaming fires.

• Help keep your family safe with this battery operated smoke alarm; It requires no rewiring for installation and provides continuous monitoring even if there's a power failure
• Equipped with both a photoelectric and ionization sensor to quickly detect both fast burning, and smoldering fires
• Single test/silence button lets you easily check alarm function and mute false alarms; Use Polaroid AA batteries for best results
• Loud 85 decibel siren sounds to alert you to danger
• To ensure complete protection make sure to place one on each level of your home and in each bedroom
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert brand trust survey in February 2018)

User questions & answers

Question:	Can this unit be side wall mounted or is it the standard top of ceiling
Answer:	The max current is 2A.
Question:	The spec sheet says color is gray - are they gray or white
Answer:	Easily - they seem to be a typical fiberglass base board, and you can score them across the holes with a box cutter type knife, or cut the boards with a saw blade. Be conscious of the dust - it's probably not good to breathe. Typically, I cut them with a hacksaw blade, which probably isn't the most graceful way to do it, but its quick and easy enough.
Question:	Does this alarm meet the Underwriters Laboratories Standard
Answer:	Not sure about M2. But M2.5 do not fit without stripping nylon threads. i.e. THE MOUNTING HOLES ARE NOT M2.5. Raspberry Pi, Pico, and associated boards use M2.5 mounting holes. So now I have to buy another set of standoffs. I will be buying M2 nylon screws/standoffs and try those. Will come back to the question after I try M2.
Question:	Does the unit beep to tell you that the battery is running low
Answer:	They are isolated

Product features

Smoke Alarms

Place at least 10 feet from kitchen/stove, and on the ceiling or high on a wall, no more than 10 inches from top.

Carbon Monoxide Alarms

Carbon monoxide alarms can be placed anywhere, not just the ceiling or high on a wall. They should be replaced every 5 to 7 years.

Fire Extinguishers

Keep in the kitchen and garage, but make sure to have the right grade for the type of fire that might occur.

Escape Ladders

Have at least one if your home has more than one story. Each room needs 2 escape routes; in most bedrooms it's the window, so have a ladder nearby.

Product description

10-YEAR BATTERY SMOKE DETECTOR ALARM : A sealed CR123A lithium battery boasts high capacity, great stability, and a long lifespan up to 10 years, avoiding the hassle of frequently changing battery SUPERIOR ALARM PERFORMANCE: Proven performance for detecting smoke from hidden and slow-burning fires; photoelectric sensor can also detect dangerous fast-burning fires that can cause extreme damages; powerful 85 dB alarm tone will sound through your entire home and instantly alert those in danger UNIQUE FUNCTIONS: Malfunction warning, low battery warning, and hush mode enabled; allows you to instantly be aware of the detector's working status; test and silence enabled by momentarily pressing Test/Silence buttan QUICK INSTALLATION: Screws and anchor plugs included for easy installation in minutes; compatible with for direct mounting to any interior ceiling; tamper-resistant pins prevent tampering and theft WIDE APPLICATIONS: Red LED flashes slowly once every 56 seconds to indicate standby mode; premium safety device for homes, offices, hotels, warehouses and other public places 1 YEAR MANUFACTURER WARRANTY

• ✔️10 year Smoke and Fire Alarm Detector, Battery-Powered no wire needed
• ✔️ Environment friendly, without smell, radiation or harm
• ✔️ Sealed-in 10-year lithium battery
• ✔️ EASY to Use Test/Silence button gives you the option to test the alarm weekly
• ✔️ 100% Satisfaction Guarantee...or your money back!
• ✔️ 5 Year Manufacturer Warranty
• ✔️ EASY INSTALL as this battery-operated fire alarm allows for simple and secure installation on walls and ceilings within minutes with the provided screws, anchor and mounting bracket

User questions & answers

Question:	California has banned smoke detectors with removable batteries. This battery is sealed in but it says it can't ship to California. Why not
Answer:	The mount screws will fit but the base plate itself is slightly smaller and you might have to touch up paint. The connectors will fit as well so no need to change those
Question:	Does this work by photoelectric or ionization or both
Answer:	Thomas it is required (International Fire Code and Electrical Code) that all detectors go off to alert all occupants. The manufactures recommend frequent dusting with a vacuum to prevent dust or spiders from causing false alarms. A 3rd wired is required in the electrical box to interconnect the detectors (Black is commonly Power, White is Neutral and Red is the Interconnect wire with bare being the ground which is not connected to the smoke alarm). The smoke alarm pigtail connector wires are black, white and orange (black to black, white to white and orange to red). Chirping is a low battery or loss of electrical power indication only. Sustained repeated loud blasts are an alarm event on the 4th blast it triggers the other detectors in the residence that are interconnected (hold the test button until the 4th blast to test the interconnection function). Mark retired Fire Marshal
Question:	is this unit U.L rated
Answer:	The unit that initiated the alarm will display a red light instead of green (while the others remain green). The same is true for the low battery latch - the unit with the low battery will flash green instead of having a steady green light. We had one unit (of 9) that kept false alarming when first installed, but we had just completed a renovation so may have been due to dust. It was nice to easily identify which unit initiated the alarm. No problems since replacing that one unit.
Question:	is this unit U.L rated
Answer:	Yes. I just replaced 2 very old (older than 10 years) BRK Electronics Model 4120B smoke detectors with these newer First Alert/BRK Brand Model 9120B units. My older units were yellowed with age, so I also replaced the plastic base. I did reuse the 3 pin electrical connector, as the "old" electrical connector matches the new unit. The new smoke detectors are functioning/self-testing normally.

Product description

For those who want a comprehensive detection system without hiring an electrician or worrying about hardwiring, the First Alert SA521CN Wireless Interconnected Hardwired Photoelectric Smoke Alarm is an ideal solution. Use this smoke detector to replace an existing hardwired smoke alarm and then install additional compatible First Alert Wireless alarms for an interconnected safety network (additional alarms sold separately). Wireless technology makes it possible for the detector to connect with up to 18 compatible First Alert wireless-enabled alarms to create a wireless safety network. These connected alarms can communicate with each other and sound in unison. The photoelectric smoke sensor is designed to reduce false alarms from cooking smoke or shower steam while remaining sensitive to real danger. The smoke detector has an integrated battery backup in case of power outages and features a single button to silence false alarms and test the unit.Eco-friendly, completely recyclable as an electronic device.

"The First Alert SA521CN-3ST (Model SA520B) Wireless Interconnect Integrated Smoke Alarm links the alarms throughout your home. This 120VAC hardwired wireless detector with battery backup integrates single alarms into a system. By adding Wireless Interconnect battery powered alarms elsewhere, when one alarm sounds, all alarms will be notified. Easily link alarms with the press of a button. The RF Interconnect technology continues to provide a reliable and secure radio frequency communication between Wireless Interconnect alarms. This technology features 915 MHz frequency with 65,000 security codes, and three channel frequency hopping. The unit is compatible with an assortment of First Alert wireless alarms, which includes the SA501CN-3ST (SA501B), SA501CN2-3ST (SA501B2), SA511B, SA511CN2-3ST, SA520B, SA521CN-3ST, CO511B. SCO501CN-3ST (SCO500B), SCO501CN2-3ST. Photoelectric smoke sensor reduces nuisance alarms. Easy access battery drawer: no need to remove an alarm from the ceiling to change battery. Includes 10-year limited warranty. Meets UL standards. Note: This product is intended for non-professional do it yourself installation. If you would like information about a professionally installed and monitored system, please contact First Alert Professional at 1-800-921-6025. First Alert Professional is not affiliated with BRK Brands, Inc. "

• Help keep your family safe with this hardwired smoke alarm that wirelessly interconnects with other First Alert–enabled alarms to create a home safety network
• Equipped with photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms
• Wirelessly connect up to 18 First Alert enabled alarms for the maximum in whole-home protection
• Hardwired alarm includes 2 AA backup batteries for continued monitoring in the event of a power outage
• Includes test/silence button, low-battery warning, EZ access battery door
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

User questions & answers

Question:	Does this come with the plug (to splice) or adapter also? Existing plug has different pin configuration. Thanks
Answer:	You must use the bracket designed for this unit.
Question:	Is this device z-wave compatible
Answer:	Ours is battery powered. Lithium battery comes with it and is sold as a 10 year battery.
Question:	I already have 3 hardwired detectors with no interconnect. I can just replace with these and they will connect right? Prefer hardwired to battery
Answer:	No...There separate Smoke Alarm Detectors and they’re sealed.....
Question:	Will this smoke alarm work if you connect it to your wired home smoke alarm system? If one alarm in your system goes off will this one be alerted
Answer:	No, it blinks once per minute.

Product features

Smoke Alarms

Place at least 10 feet from kitchen/stove, and on the ceiling or high on a wall, no more than 10 inches from top.

Carbon Monoxide Alarms

Carbon monoxide alarms can be placed anywhere, not just the ceiling or high on a wall. They should be replaced every 5 to 7 years.

Fire Extinguishers

Keep in the kitchen and garage, but make sure to have the right grade for the type of fire that might occur.

Escape Ladders

Have at least one if your home has more than one story. Each room needs 2 escape routes; in most bedrooms it's the window, so have a ladder nearby.

Product description

Photoelectric sensor battery operated smoke alarm, designed to alert you & your family to the dangers of smoke & fire, includes a 9V, protecting you even during a power failure, UL listed & offers a 5 year limited warranty. This product adds a great value. Product is highly durable and very easy to use. This product is manufactured in china.

From the Manufacturer

70% of all home fire deaths occur in homes with no alarms or no working alarms, and nearly one quarter of smoke alarms in reported fires are not working. Kidde battery operated photoelectric smoke alarms are designed to help protect you and your family from the dangers of fire. Photoelectric sensing alarms may detect visible fire particles (associated with slow smoldering fires) sooner than Ionization alarms. Studies show both types will effectively detect either type of fire. For optimal protection, install both smoke alarm technologies in your home. Install UL listed smoke alarms on every floor of your home, in hallways, inside bedrooms and outside of sleeping areas. Replace smoke alarms every 10 years.

• Advanced photoelectric sensor is especially effective in detecting smoldering fires
• Battery backup 9V battery included (best with Polaroid 9 Volt batteries)
• Battery pull tab eliminates battery installation time and keeps battery fresh
• Quick connect power harness makes installation fast and easy
• Kidde’s smoke alarms meet the requirements of Underwriters Laboratories (UL), an independent facility that tests products for compliance with widely-accepted safety standards

User questions & answers

Question:	Is this model good tho replace my old Lifesaver Ionization Smoke Alarm Model
Answer:	Dear Customer, Its material is PC material, high temperature resistance, corrosion resistance, and has been tested by the US Federal Fire Safety Bureau for strict UL standards. Its chip is a photoelectric sensor, very sensitive and prevents false alarms
Question:	Is there any danger from any kind of radiation using this device
Answer:	Hi, Battery life is a section we value very much. The quality of the battery has been rigorously tested by all X-Sense engineers. It does work for 10 years. But it can't be replaced. Both the sensor and the battery have a 10-year lifespan and replace the entire smoke alarm after 10 years. If you encounter any problems while using the product, please contact us and we will fix it for you at any time. Thanks
Question:	How does this smoke detector mount to the ceiling
Answer:	Excellent question to which I have no answer. I would recommend the manufacturer's website. I can tell you that I have purchased many smoke detectors over the years. This one has some serious substance to it. Solidly built. All componets are internal, including the battery. I highly recomend the product. If for some reason it quit working after 5 years, I would still feel that I got my money's worth.
Question:	My alarm just started to go off. After removing it, it stopped. Then it started up again. There is no fire or smoke. Has my alarm become defective
Answer:	I just took a look and it must only flash when testing - I just watched it for over a minute and there was no flash.

Product description

BRK SC7010BV Combination Smoke & Carbon Monoxide Alarm with Voice & Location is easy to program with 11 pre-programmed home locations. The voice alarm not only tells you what part of the home is in danger, but whether the danger is smoke or carbon monoxide. The photoelectric smoke sensor reduces nuisance alarms from cooking smoke or shower steam and electrochemical carbon monoxide sensor for increased accuracy. A single mute/silence button silences any nuisance alarms that may occur and tests all alarm functions. With an easy access side battery door, the batteries are easy to replace and there is no need to remove the alarm from the ceiling to change a battery. Meets UL standards. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

• Keep your family safe with this 3-pack of talking hardwired smoke and carbon monoxide alarms; they're equipped with voice and location, so you are alerted of the danger and where it originates from across your house
• Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 pre-programmed locations in your home
• Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms
• Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected
• 10-year limited warranty; equipped with end-of-life signal chirp, so you know when it's time to replace the unit for your safety
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
• Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

User questions & answers

Question:	How do these talk to each other? Are there wifi frequencies or radiation
Answer:	Nothing can turn it off. Ours went off at 4am for no reason and wouldn’t turn off for anything. There was no heat, no smoke, we held the button, took our battery. Still trying to find instructions online and can’t find anywhere.
Question:	When hardwired, will they all announce their location or only the room that triggered the entire system
Answer:	The instructions firs said to place it on the ceiling, but later mentioned using a wall. The mounting plate has a screws as well as a sticky pad that is magnetized on the other side to attach the alarm to. The sticky pad was not strong enough to hold, so the screws are necessary as well.
Question:	If there are two - living room and bedroom. does the bedroom one say "fire detected in living room" or is it local only for voice location
Answer:	Not to my knowledge
Question:	Do the voice models have alarm and voice? Or just voice
Answer:	Complies with California state fire marshal (CSFM)

Product description

The First Alert SC7010B Hardwired Combination Photoelectric Smoke and Carbon Monoxide Alarm with Battery Backup delivers both smoke and carbon monoxide detection in a single unit. Equipped with a photoelectric sensor and Optipath 360 technology, the alarm detects smoke produced by smoldering fires while keeping false alarms to a minimum. The unit also features an advanced electrochemical sensor that detects carbon monoxide leaks from multiple sources such as faulty fuel-burning appliances and blocked chimneys. If a threat is detected, the alarm emits a spread spectrum horn tone that is designed to be heard by people with age-related hearing loss. Made to be hardwired directly into the electrical system of your home or facility, this 120-volt hardwired smoke detector features a backup battery that helps keep the alarm functioning even in the event of a power outage. The alarm's perfect mount system allows for easy installation and alignment, while its low battery latch gives a visual indication if the battery is running low. And thanks to the convenient test/silence button, it is easy to check alarm function and mute false alarms. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

From the Manufacturer

The BRK Model No. SC7010B is a wire-in, 120V AC 60Hz single and/or multiple station combination smoke and carbon monoxide alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi-family dwellings as defined in standard NFPA 101. Model SC7010B complies with UL217 and UL2034, CSFM, NFPA 72 and NFPA 720, HUD, FHA and other agencies that model their codes after the above agencies. It meets building codes where AC/DC photoelectric smoke and carbon monoxide alarms are required. The BRK SC7010B is a state-of-the-art hardwired with battery backup smoke/CO combo alarm that features a photoelectric smoke sensing chamber, an electrochemical CO sensor and an End of Life signal. The Spread Spectrum Horn Tone has a lower and varying frequency that makes it easier for the elderly with normal age related hearing loss to hear the horn. This alarm features two latching features and two silence features. Alarm Latch: Easily identifies initiating alarm even after alarm condition has subsided. Low Battery Latch: Identifies which unit is in low battery condition by blinking the green power light. Low Battery Silence: Temporarily silence the low battery chirp for up to eight hours. Alarm Silence: Silence alarm for several minutes. Other features include an 85dB horn, single button test/silence, an easy access battery drawer and dust cover. OptiPath 360 Technology: Exclusive patented technology provides 360 degrees of direct access to the smoke sensor. Two locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a Quick-Connect wiring harness. Installation is quick, easy and cost effective.

• Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure
• Features electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor equipped with Optipath 360 technology that enhances detection with 360 degree access and reliably detects smoke from smoldering fires
• In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues
• Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected
• 10 year limited warranty; Equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety
• Rigorously tested to meet UL standards
• Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

User questions & answers

Question:	How often do these need to be replaced because of "end of life" warning? I feel like we are constantly replacing them and don't know what's normal
Answer:	The installation instructions for this unit notes that it can be wall mounted, "If allowed by local building codes," (check with your Buildings Department - since several codes are in use in various localities) - with the proviso that the top of the mounted unit must be between "4 inches and 8 inches" below the wall-ceiling meeting, to avoid dead air space.
Question:	Will this First Alert unit plug into my existing BRK 3-wire pigtail connector, or do I have to buy a BRK unit? Thank you
Answer:	Off-white.
Question:	Does anyone know if this smoke/carbon monoxide alarm is compatible with a house full of First Alert 9120Bs (smoke only)? Want them all connected
Answer:	Nor sure about that particular standard, but box states that it complies with ANSI/UL Standards, California state fire marshal, FHA, HUD, and National Fire Protection Association.
Question:	I have Model No. SC7010BV. Is the same replacement without the "V
Answer:	The beep is effective. It always seems to start in the middle of the night. I twist the unit off the ceiling and do a battery swap and have it back on the ceiling in less than a minute, craw back into bed before really waking up. It's not a pain to replace the batteries, it's very easy. Simply slide the tray out and pop new ones in. The batteries fit snuggly in the compartment and there are tabs that allow you to push the batteries out by applying pressure with your thumbs from the back side. There is an optional screw hole to make the battery compartment tamper resistant. This prevents people from easily taking the batteries to power their remote controls or whatever. When fire marshals inspect fire related deaths it's not uncommon to find the smoke and fire detectors had no batteries installed. This simple, optional, screw might seem like "a pain" to some people, but it's an easy way to save your life. This is a great unit. I have 6 in my house and I highly recommend them to everyone.

Product description

Complete Home Protection

According to US data analysis, a family fire begins every 38 seconds. The faster you know about the fire, the sooner you start moving your family, and the smoke alarm at work reduces the risk of home fire deaths by 50%.

Advantage

1.The smoke alarm with test button allows you to test the unit's functionality. 

2.It features a low battery alert to remind you when to change the battery and has a missing battery guard to ensure that a battery is placed inside the alarm. 

3.The side battery drawer slides open for easy battery replacement. A blinking power indicator on the unit confirms that it is receiving power.

4.The alarm contains an optional pin to lock the battery and unit in place for tamper resistance. 

5.It can be mounted on either the ceiling or the wall and can be used in mobile homes and RVs.

Attention1.The Smoke Detector contains the test button.Flickering power indicator,When the red LED light flashes for 32 seconds, it indicates that the smoke alarm is running normally.

2.When the alarm senses products of combustion and goes into alarm, the red LED will flash rapidly (one flash per second)..The rapid flashing LED and pulsating alarm will continue until the air is cleared or the test button is released.

Specifications: 

1.DC 9V battery operated 

2.Photoelectric chamber for early detection from all directions 

3.Loud>85dB (A) alarm signal @3M 

4.Flash alarm indicator (red LED). 

5.Test button for easy recommended monthly testing

6.Low battery signal 

7.Safety clip feature, does not allow mounting of smoke alarm without battery installed

8.Ceiling mounting 

9.Easy to install with mounting bracket 

10.5 years prodcut life time

• Photoelectric Smoke Alarm Sensing Technology: A faster sensing technology at detecting the dangerous situation than ionisation alarms, red LED will flash and the alarm pattern will sound, Loud 85 decibel alarm with compensation design.
• Battery-Powered Smoke and Fire Alarm Detector: no wire needed，not Hardwired
• Test/Slience Button: Tests the unit for proper operation and resets the carbon monoxide alarm,Alarm Volume: Loud > 85dB(A) at 1 meters.Loud 85-decibel alarm is designed to be heard easily.Pls kindly press if false alarm.
• Easy Install and Use: The alarm can easily install with mounting bracket.No hardwired anymore, very convenient to install at home or bedroom - wall mount, screws included.
• Safety and 5 year Warranty: .Low battery signal lalarm and "end of life"warning ensures the detector can work normal. Environment friendly, without smell, radiation or harm.If any problem,contact with us without hesitable,we will reply to you asap.

User questions & answers

Question:	How many come in a pack? The listing says 6, but some people in reviews say only got
Answer:	The detectors with sealed batteries have a 10 year lithium battery installed, and have a slightly lower standby current draw. If the unit were to go off frequently, the battery of course would not last the 10 years. The sensing circuits on all manufacturers devices are only good for about 10 years, as this is there approximate life of the radioactive element inside the chamber. Hence, it makes no sense for a manufacturer to put a longer lasting battery in them. Units with replaceable batteries usually come with a 5 year battery, which you should replace once and then get a new detector on the 2nd battery's end of life.
Question:	Are their pics of the back to see if it connects with my 3-prong wiring system
Answer:	Wall mounting is permitted by the manufacturer, although ceiling mounting is generally preferred. The smoke alarm must NOT be mounted too close to a room corner, or it will be ineffective. See the manufacturer's literature for information and restrictions on mounting locations. Best.
Question:	Where is the manufacture date on the smoke detectors
Answer:	Yes, through X-Sense's US distributer, which also confirms the firmware matches the US standards.
Question:	How does the battery gets installed. Images doesn't provide any directions there
Answer:	All the X-Sense detectors are made in China. However, they have a US division that ensures the firmware adheres to all NFPA and UL standards. Every country has different requirements, thus different firmware. All R&D and manufacturing is done in China.

Product description

The First Alert tamper resistant lithium battery powered smoke alarm provides a full 10 years of protection without having to change the batteries! Tamper resistant design eliminates removal of batteries for other uses and ensures operation over the life of the alarm. Mute feature silences nuisance alarms from cooking smoke or shower steam. This smoke and fire alarm includes power LED and alarm indicator, end of life signal and single test/silence button so you can test your alarm regularly. For maximum protection and the ultimate in assurance, you can depend on First Alert to secure what matters most in life. Includes a 10-year limited warranty.

From the Manufacturer

The First Alert tamper resistant lithium battery powered smoke alarm provides a full 10 years of protection without having to change the batteries! Tamper resistant design eliminates removal of batteries for other uses and ensures operation over the life of the alarm. Mute feature silences nuisance alarms from cooking smoke or shower steam. This smoke and fire alarm includes power LED and alarm indicator, end of life signal and single test/silence button so you can test your alarm regularly. For maximum protection and the ultimate in assurance, you can depend on First Alert to secure what matters most in life. Includes a 10-year limited warranty.

• Complies with all current 10-year legislation in U.S. states/cities where required
• Alarm features an ionization sensor for smoke detection, which is effective in recognizing smoke from flaming fires such as paper and grease fires
• Battery-operated unit provides continuous monitoring even if there's a power failure: plus, it's easy to install
• Alarm also features loud 85-decibel alarm, easy mounting bracket, a single test/silence button, and an end-of-life signal so you know when to replace the unit
• To ensure complete protection make sure to place one on each level of your home and in each bedroom.Same Features as SA340CN and SA340B but adds Sealed Battery Technology.
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
• Complies with all current 10-year legislation in states/cities where required

User questions & answers

Question:	What is the dimension of the outside ring? I'm replacing old ones and want to cover the spot where the old one is
Answer:	Description says "UL217 Certified" but others here say it isn't. Sent the question to the seller.
Question:	Does this alarm warn for carbon monoxide too
Answer:	Photoelectric
Question:	I recently purchased three of these smoke alarms from Amazon. Can you tell me how high
Answer:	No, it is not. Also, there is no manufacturer or country of origin.
Question:	Is this detector a photoelectric or ionization type
Answer:	These appear to be manufactured by Heiman (model HM-626PHS) out of Guangdong, China. They are not UL rated, certifications include: EN14604 (UK), CE REACH BOSEC(Belgium). Hope this helps. https://www.amazon.co.uk/gp/product/B015R451B6/ref=s9_acsd_hps_bw_c_x_3_w

Product features

Smoke Alarms

Place at least 10 feet from kitchen/stove, and on the ceiling or high on a wall, no more than 10 inches from top.

Carbon Monoxide Alarms

Carbon monoxide alarms can be placed anywhere, not just the ceiling or high on a wall. They should be replaced every 5 to 7 years.

Fire Extinguishers

Keep in the kitchen and garage, but make sure to have the right grade for the type of fire that might occur.

Escape Ladders

Have at least one if your home has more than one story. Each room needs 2 escape routes; in most bedrooms it's the window, so have a ladder nearby.