12 best lab thermometers

Product description

Temperature range:-20/150 Degrees Celsius | Style:Total Immersion This economical H-B Instrument DURAC general purpose total immersion thermometer is filled with red spirit liquid and has a temperature range of -20 to 150°C. For use with chemical laboratories, universities, scientific institutions, food and beverage processing, petrochemical laboratories, pharmaceutical industry, medical industry, manufacturers, dairies, breweries, and distilleries. This thermometer features accuracy equivalent to the accuracy requirements of ANSI/SAMA Z236.1-1983, where ranges are specified. Thermometers calibrated for total immersion indicate accurate temperature when the thermometer is immersed to the liquid level in the capillary. For example, when thermometers measure atmospheric temperature, semi-solids, or liquids, the thermometer is immersed up to the tip or meniscus of the liquid column. Individually packaged in recyclable Safety-Pak packaging with a non-roll fitting. Durable and accurate. Liquid Fill: Red Spirit. Glass type: White back. Range: -20 To 150°C. Divisions: 1°. Length: 305mm. Immersion Length: Total. Accuracy: 1°C. 25/Case. H-B Instrument #: 2/1150. Per Each. HB Instrument #: 2/1150. Research, industrial and healthcare professionals rely on SP Scienceware for their sample handling needs. Sold worldwide, Bel-Art and H-B Instrument brand laboratory supplies include over 5,000 items from safety wash bottles to fume hoods, thermometers, racks, desiccators, hydrometers, ice buckets, scoops and spoons. Custom calibration services, plastic molding, specialty coatings and wire manufacturing are also available. Wilmad-LabGlass brand laboratory glassware complements Bel-Art and H-B Instrument with over 7000 items including NMR and EPR consumables and specialty glassware, as well as custom fabrication for individual glassware, glass repair services and OEM glass parts. SP Scienceware is a division of Warminster, PA based SP Industries which also include SP Scientific laboratory, thermal management, and pharmaceutical production equipment and SP Ableware aids for daily living.

• Temperature range: -20 to 150°C
• Liquid fill: red spirit; glass type: white back
• Total immersion; length: 305mm; accuracy: 2°C

User questions & answers

Question:	will this fit a 24 40 thermometer adapter
Answer:	Yes. The thermometers are approximately 6.5mm in diameter. The normal thermometer adapter has an opening in the center of 7mm, with an O-ring so that they will accommodate thermometers between 6-7mm. The center hole is the same whether it is a 14/20, 19/22 or a 24/40 adapter.
Question:	What is the diameter on this thermometer
Answer:	Approximately 3 mm. Same as most glass thermometers. Same size as what is in a beer brewing kit.
Question:	Can this be used outdoors to measure temperture
Answer:	Hi Robert! My name is Mike at Bel-Art/H-B Instrument & SP Scienceware. Absolutely! I hope this answered your question, but if not, please email me at [email protected]…
Question:	How long is this thermometer? I need it for a decoration to put inside of a beaker
Answer:	Length is 12 inches or around 30 cm. The thickness or diameter is almost 3/4th of that of a standard pencil.

Product description

This thermometer has a scale from 0-110 C. Great all purpose thermometer that takes quick, accurate readings. Very useful as a benchmark for calibrating other thermometers.

• Laboratory thermometer
• Quick, accurate readings
• Note: units can be either transparent yellow or transparent white

User questions & answers

Question:	What is its Range
Answer:	0 to 220 F or -20 to 110 C. It is a partial immersion thermometer (the tip of the thermometer up to about 2.5 " is to be exposed to the liquid of gas to measure the temperature). It is NOT total immersion thermometer (cannot be totally placed in the oven or similar to measure the temperature).
Question:	how long is it
Answer:	It is 11 3/4 ". about 12 inches.
Question:	Is it a mercury thermometer
Answer:	No, it is not mercury filled. Please read this for filling: http://en.wikipedia.org/wiki/Alcohol_thermometer
Question:	how is its acuracy
Answer:	Doesn't agree with other thermometers. Maybe it's only useful for liquids, too slow to react to changes in air temperature.

Product description

• Dual-range digital thermometer for measuring temperature in test-tubes, beakers, and other laboratory equipment
• Measures temperature from -50 to 300 degrees C (-58 to 572 degrees F), with an accuracy of + or - 1 degree C between -30 and 250 degrees C
• 7.5" stainless-steel probe is resistant to most chemicals
• LCD with 0.75" digits for increased visibility
• Calibrated to ISO 17025 traceability standards for reliability of measurements

User questions & answers

Question:	Can this be used on animals
Answer:	It's highly accurate. So long as the probe can be inserted into whatever medium whose temperature is stable for a short period, it should work. It's highly accurate in my aquarium, though I've not tried it on animals.
Question:	Description says + or - 1 degree c accuracy. how is that considered traceable accuracy? traceable needs to be to more than +/- .3c or .5f
Answer:	I think that your definition of "traceable" is faulty. To be traceable, it must have been tested against a certified standard, and show to be accurate within the stated specs - with appropriate documentation. It's more complicated than that, of course, but there is nothing about "+/- .3C" in the definition of "traceable."
Question:	Can i recalibrate this if needed
Answer:	Yes. You can send it to Thomas and they will re-certify the unit.
Question:	Would like a thermometer accurate to 0.3 f but only need range from 60 to 90 f. maybe limiting the range can produce that accurracy. models
Answer:	Precision electronic thermometers are available--as are precision liquid-in-glass thermometers--but , either type can be seriously expensive. (BTW: "Precision" is meaningless for consumer grade thermometers, like "heavy-duty" or "professional".) These days, the best digital thermometers are vastly more accurate and stable than the best LiG. I've got Brooklyn Thermometer 24" LiGs that don't even come close to my Martel BetaProbes. You can do a poor man's single-point calibration comparing this Thomas model to a fever thermometer--which is required to be +/-0.2F around body temperature (but not all actually are that accurate). Fertility thermometers ~claim~ +/-0.1F. If you are an electronics-techie type (or know one) medical catheter themistors cost $12 to $15 and can be read to the accuracy you need with any decent DMM (Digital Multi-Meter). The Amphenol MA100GG103A can be found at Digi-Key or Mouser, and also here on Amazon: ASIN B00DKYM3EY. A table to convert resistance to temperature is in the data sheet.

Product description

The General Tools DT310LAB Digital Thermometer quickly generates accurate temperature readings from -58 to 302 degrees Fahrenheit (-50 to 150 degrees Celsius). The easy to use digital stem thermometer has a 8.38-in. (127mm) long stainless steel probe. The digital readout shows temperatures to the nearest 0.1° and features hi and lo alarms to alert of any larger changes in temperature as well as a minimum and maximum memory feature that remembers what the past extremes have been. This versatile thermometer is great as a food safety or food prep thermometer in the kitchen but can also be used in a wealth of other uses from HVAC or as a lab, scientific or industrial thermometer. The display is powered by a "LR44" battery and is included. The thermometer has an auto-off after one hour of inactivity as well as on/off switch.



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• PROBE- 8.38-inch (127mm) long
• TEMPERATURE RANGE- Measures from -58 to 302 degrees Fahrenheit or -50 to 150 degrees Celsius and displays either with °F/°C switch
• DIGITAL- Minimum/maximum memory and data hold make this the ideal food prep, food safety, lab, scientific or industrial thermometer
• RUGGED DESIGN- Rustproof and long-lasting stainless steel probe is light, tough and shock-resistant while auto power-off preserves the battery
• INCLUDES- Protective sheath with a pocket clip for storage and portability as well as a "LR44" battery

User questions & answers

Question:	Doe it come with a certification of calibration
Answer:	No

Product description

NOTE1. The measuring surface is about 2 cm below the infrared aiming point. 2. For best accuracy, the distance between the thermometer and object of measurement should approximately be 14. 17inches (36 cm). Etekcity Laser grip 774 Thermometer guns have been used by major airports and security offices during the 2014 Ebola outbreak. Laser Guided Aim with precision at whatever you wish to measure, thanks to the laser beam guidance feature. Even from a far distance, the laser provides a mark to ensure accuracy every time you make a measurement. Infrared Lens The Infrared lens inside the Laser grip 774 Thermometer provides temperature readings without the need to touch or come close to anything dangerously hot or cold. You'll be able to effortlessly measure high temperatures, hazardous and inaccessible objects, and even moving targets; such as hot engine parts, cooking surfaces, swimming pools, bath water, wine coolers, hot asphalt, electric bearings, and much more.

• BETTER ACCURACY: 12: 1 D:S, meaning it can accurately measure targets at greater distances compared to most others; For best accuracy, the distance between the thermometer and object of measurement should approximately be 14.17 inches (36 cm)
• TARGET QUICKER: Measure surface temperature ranging from -58℉ to 716℉(-50℃ to 380℃), you can choose the unit from ℉ to ℃; Response time: ≤500Ms; A built in laser gives you the precision to hone in on the exact space you want to measure
• ADDED FUNCTIONS: The LCD screen is backlit, also has an auto-off function to extend the battery life, and features a low battery indicator so you never accidentally run out of juice (battery included)
• VERSATILE DESIGN: Infrared technology makes it to measure the surface temperature of various objects especially temperatures above boiling points and below freezing points; Use it for cooking, ovens; AC, refrigerators; or soapmaking cats toy etc.
• NOTE: Temperature readings from this devices are inanimate objects. The measured temperature for humans or animals will not be correct. Class 2 laser, optical power 0.5-0.9mW

User questions & answers

Question:	Can this thermometer get the temperature in a dryer
Answer:	I doubt it. The wavelength of the sensor is 8-14 microns and plexiglass has very low transmittance beyond about 3 microns (according to this spec sheet http://www.plexiglas.com/export/sites/plexiglas/.content/medias/downloads/sheet-docs/plexiglas-general-information-and-physical-properties.pdf). Whether or not the material your dryer door is made of is the same is another matter. If the transmittance is close to zero then you will essentially be measuring the temperature of the outside of the door.
Question:	Does this work on internal meat temperatures
Answer:	If you cut the meat in half you might be able to take the surface temperature of the meat, but then your meat is going to be cut in half and that's not real appetizing. Blue cheese is very appealing, maybe some bacon.
Question:	Will this take the temperature of a child's fever also
Answer:	If your child can open their mouth and hold it open for a few seconds, then YES! It is an extremely accurate way to measure temperature! Just point the dot at the back of the throat, and it gives you an immediate and accurate reading. I'm at a loss why people only considered pointing it at their foreheads or other external body parts.
Question:	What is the range (distance from gun to target) or recommended for this gun? How accurate is it at 6-8 feet range
Answer:	The 12:1 ratio means at 12" the gun is accurate for a one inch spot. So at 6'-8' it will be accurate for a 6"-8" inch spot. So the farther you get away from the spot being measured, the less accurate it will be. Like Cheryl said, think of it like a cone.

Product features

Point. Aim. Measure.

Practical for both indoor and outdoor use, the Lasergrip 774 lets you safely measure surface temperatures from a distance while still maintaining laser-sharp accuracy. Measure extreme temperatures ranging from -58°F (-50°C) to 716°F (380°C) without ever needing to come in contact. Use the infrared temperature scanner for a high range of applications, from internal electronic components to oven temperatures. With user-friendly operation and a temperature measurement range.

Laser Guidance

Know exactly what you’re measuring with a built-in laser pointer to maximize the Lasergrip’s 12:1 distance-to-spot ratio.

Crystal Clear Display

View accurate readings on a clear backlit display.

Scan & Lock

Instantly holds readings on the display for 15 seconds after measuring so you can record your readings.

Durable Exterior Body

Features a UV paint coating that helps reduce scratches and prevent everyday wear and tear while on the job.

Use It at Home

Make sure typical home appliances like AC units or heaters are functioning properly.

In the Field

Perform electrical repairs or automotive maintenance.

Not for Human

The thermometer can't measure the internal temperature of an object; Temperature readings from this devices are inanimate objects, the measured temperature for humans or animals will not be correct.

Product description

VEE GEE High accuracy digital 12" stem thermometers are ideal for temperature monitoring in most laboratory settings. Great for monitoring reagents and liquids in test tubes, beakers, & flasks, VEE GEE digital thermometers are an essential tool used in food processing, refrigeration, and horticulture.

User questions & answers

Question:	What is the accracy specifications
Answer:	0.1° / ±1.0°C & 0.1° / ±2.0 °F
Question:	I just got this thermometer today & it keeps displaying llll ...i stick it in a cup of tea and it displays the same. is this defective
Answer:	It must be defective. I’ve used this thermometer for six months. When I turn it on it displays horizontal dash lines for a second and then displays the temperature.
Question:	What material is the stem made out of and its diameter
Answer:	I believe the stem is stainless steel. I don’t have a tool to measure the diameter accurately, but it is around 5/32 to 3/16 of an inch.
Question:	After putting in new batteries, does it need to be calibrated
Answer:	I dont think so. It did not for me.

Product description

Accurately monitor temperatures in freezers, water baths, heating blocks, incubators, and refrigerators with this enclosed temperature-buffered sensor. Bottle insulates sensor from rapid temperature changes when refrigerator door is opened.Triple display simultaneously shows high, low, and current temperatures. min/max monitors high/low readings overnight, on weekends, or for any time period-a significant advantage over current reading-only glass thermometers. Range is -58 to 158 degree F with a resolution of 1 degree and accuracy of +/-1 degree C. Alarm feature provides alert when temperature rises above or falls below a set point. Alarm is programmable in 1 degree increments. Visual and audible signals continue even if temperature returns to non-alarm range. Ten-foot micro-cable permits refrigerator doors to close on it. Solid-state probe eliminates mercury contamination in refrigerators. Probe is sealed in a miniature bottle (1 x 2.5") filled with nontoxic glycol. Solution is GRAS (generally recognized as safe) by the (Food and Drug Administration). Eliminates concerns about incidental contact with food or drinking water. To assure accuracy an individually serial-numbered Traceable certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). High-impact, chemical-resistant ABS plastic case. Measures 2.75" width by 4.25" height by 0.75" thick. Weight is 4 ounces. Supplied with Traceable Certificate, flip-open stand for lab bench, slot for wall mounting, and Velcro and magnetic strips to attach bottle unit to any surface.

• Probe is sealed in glycol solution
• Min/max memory
• High and low settable alarms
• Measures 2.75" width by 4.25" height by 0.75" thick

User questions & answers

Question:	Does this thermometer comes with a current up-to-date calibrator certificate
Answer:	It was good for about 20 months
Question:	Can you download the temp logs to your pc via USB or flash drive? How long does it keep logs? 30 days or is it less
Answer:	This version does not have the capability of transferring the info to a USB or flash drive. We keep paper logs at our facility, so we manually recorded.
Question:	Is the bottle made of glass
Answer:	Yes. I've seen some with plastic and the readings aren't as accurate. I'm not sure if there was a different reagent in the bottle or if the material played a part in that though.
Question:	Is there a warrenty with this item
Answer:	It depends on what warranty means. Each thermometer comes with a traceable certificate of calibration which is good for 2 years. You can have these thermometers recalibrated if needed by the company

Product description

The PDT650 is a rugged Pocket Thermometer featuring an extended temperature range, built-in magnetic mount, folding temperature probe and a large easy-to-read display. The PDT650 provides reliable and accurate measurements in demanding environments. They are perfect for HVAC, refrigeration and food service areas, or anywhere Temperature monitoring is critical.

From the Manufacturer

UEi Test Instruments has over 50 years’ experience designing and manufacturing a broad range of award-winning, industry-leading Test and Measurement Tools. Professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. UEi backs its products with dedicated technical support, service and repair teams.

• The product is easy to use
• The product is durable
• True-RMS for accurate measurement in all applications
• -58 to 572-degreeF (-50 to 300-degreeC)
• Folding temperature probe
• Built-in magnetic mount
• MIN/MAX record
• Auto power off

User questions & answers

Question:	Does this come with a certificate? nist
Answer:	the packaging was minimal. I don't recall seeing a "certificate" if you mean a calibration certificate or anything like that.
Question:	Is this good for measuring air temperature in a room
Answer:	Yes it reads ambient air temperature
Question:	can you zero this before each use
Answer:	No it doesn't zero. Just displays current temperature
Question:	How fast does it read
Answer:	It's not as fast as a Delta Track pocket thermometer but it's not 25 to 30 bucks either. I have 7 of these UEI's, I use the for checking discharge Air temperatures in refrigerated cases. They're very accurate, just as accurate as any Delta Track I've used. Plus, the magnet works well and the probe folds up.

Product features

PDT650 - Pocket Folding Thermometer

The PDT650 is a versatile and rugged pocket thermometer featuring an extended temperature range, built-in magnetic mount, folding temperature probe and a large easy-to-read display. The PDT650 provides reliable and accurate measurements in demanding environments. They are perfect for HVAC, refrigeration and food service areas, or anywhere temperature monitoring is critical.

Functions

'-58 to 572˚F (-50 to 300˚C).

Folding temperature probe Built-in magnetic mount.

MIN/MAX record.

Auto power off.

Large easy to read Display.

Applications

The PDT650 offers a folding temperature probe in conjunction with a built-in magnetic mount. The combination of these features offers a pocket–sized thermometer flexible enough to be used in diverse applications. The probe reads in any folding position and the exposed tip gives accurate readings even when closed.

Warranty

The PDT650 is warranted to be free from defects in materials and workmanship for a period of three years from the date of purchase.

Product description

• Dual-range digital thermometer for measuring air or liquid temperature in laboratories, food processing, refrigeration, and green houses
• Measures temperature from -50 to 150 degrees C (-58 to 302 degrees F), with an accuracy of + or - 1 degree C/2 degrees F
• 127mm/5" stainless steel probe provided with a protective case
• Swiveling head that can be moved up to 180 degrees for viewing from any direction
• Automatic power-off after 10 min to conserve battery power

Product description

Teach students all about temperature and how to read thermometers, what causes the temperature to rise or fall, and the temperatures needed to boil and to freeze water. Measure a wide range of temperatures with these thermometers specially designed for student safety. Thermometers measure 6-3/4" in length.

• Measure a wide range of temperatures with these thermometers specially designed for student safety
• Features dual-scale temperature readings from -40°F to 140°F and -40°C to 60°C
• Mercury-free & recessed glass tube for safe classroom use
• Thermometers measure 6 ¾" in length
• 6 thermometers per pack

User questions & answers

Question:	can these be used to measure body temps, like for fevers
Answer:	These are not intended to measure body temp. I would not buy it for that.
Question:	Exactly how long is the glass tube in these units? I'm not talking about the plastic. I need a specific size glass tube themometer for a project
Answer:	I’m sorry I don’t know. They’re packed away. They work great, though.
Question:	I need to measure water with first graders. Can you put them in water? Any teachers use them? Thanks
Answer:	Yes, you can immerse them. Be aware they may be very inaccurate. I compared four thermometers lying next to each other and the readings varied by several degrees.
Question:	Can these be used to measure water temperature
Answer:	These can't be used to measure anything they are too inaccurate

Product features

Thermometers for Indoor Science Use

Teach students all about temperature and how to read thermometers, what causes temperature to rise or fall, and the temperatures needed to boil and to freeze water. Measure a wide range of temperatures with these thermometers specially designed for student safety. Thermometers measure 6-3/4" in length.

DUAL SCALE

Dual-scale temperature readings from -40°F to 140°F and -40°C to 60°C

Includes

Set of 6

Product description

Cooper-Atkins DPP800W MAX Digital Thermometer with Long Probe, Long Probe Thermometer

Long probe thermometer with extra large, easy-to-read LCD. Waterproof digital thermometer designed to run through dishwashing machines to check final rinse cycle temperatures. The sensor, located at the end of the reduced tip, provides the most accurate reading available in a digital pocket test and has a quick response time of less than 6 seconds.

When fully extended using the sheath, MAX measures a full 12" in length, keeping hands at a safe distance from a heat source. The ultra fine tip allows for a very quick read and the antimicrobial infused body and sheath provides the user with an extra layer of food safety protection.

Technical Specifications

- Long Probe Thermometer Temperature Range: -40 to 450 degrees F (-40 to 232 degrees C)

- Temperature Accuracy: +/- 1 degree F (+/- 0.5 degree C) from 32 to 212 degrees F (0 to 100 degrees C)

- Thermometer Features: Hold, Min and Max Memory, Low Battery Indicator

- Thermometer LCD Height: 1.5" x 0.5"

- Thermometer Waterproof Rating: IPX7

- Instant Read Response Time: Less than 6 Seconds

- Thermometer Probe Length: 4"

- Thermometer Battery: 1.5 V #LR44 Battery Included, 500 Hours



About Cooper-Atkins Corporate

Since their establishment in 1885, Cooper-Atkins has built a solid reputation as a leading manufacturer and provider of quality time, temperature and humidity instruments. The inventor of the first bimetal oven thermometer, David G. Cooper, founded The Cooper Oven Thermometer Company in 1885. The Cooper-Atkins Corporation takes extreme pride in their service levels and in customer relationships. These qualities have helped their business grow for 125 years. As a leading manufacturer of environmental and innovative food safety solutions, Cooper-Atkins has a global reach and is a trusted resource for reliable, high-quality instruments and expert advice.

• Dual-range digital thermometer for monitoring temperature in food products and food service applications, including dishwashers
• Measures temperature from -40 to +450 degrees F (-40 to +232 degrees C), with an accuracy of + or - 1 degree F (+ or - 0.5 degrees C) from 32 to 212 degrees F (0 to 100 degrees C)
• Stainless-steel stem-style probe is 4" long and has a reduced penetration tip for taking measurements while immersed in liquid or air
• Minimum/Maximum temperature memory stores high and low readings
• Certified to IPX7 for protection against immersion in water up to 1m

User questions & answers

Question:	What do you do with the min/max button. How do you use it
Answer:	If you are taking several temperatures of an item over time, e.g., you are wanting to bring the temperature up over 145F, and you begin taking a temp every few minutes, after a few minutes you walk away from the process and can't remember what your last reading was - the max value will tell you (the most recent max value recorded). The same applies in reverse, say you are bringing a temperature down over time, you check every few minutes, walk away from the process, can't remember your lowest reading - the min value will show you the most recent value recorded. It can be a useful feature. That is basically the way I use that function. If you think you are going to use it that way, clear the values in memory first, so you start with a clean record.
Question:	Can I put the whole thermometer in the oven? Or will this melt it
Answer:	I wouldn't. It can take the heat of a dishwasher but that's not close to the temps used in an oven. I've stuck mine into a roast to see if the inside is at the proper temp like using an instant read digital thermometer. It does fine in that capacity.
Question:	Can this be calibrated
Answer:	Saru, my owner's manual does not mention calibration. I'm sure the factory has a calibration routine but this may not be accessible through a secret button combination (or it could be?). Here is the specification nugget for this probe and for my purposes this is accurate enough not to need calibration: Temperature Range: -40° to 450°F (-40° to 232°C) * Accuracy: ±1F° (±0.5C°) from 32° to 212°F (0° to 100°C) * Resolution: 0.1°Regards, Rich
Question:	What do you do with the min/max button. How do you use it
Answer:	All I know is the max is most likely a preset number, press the button and it shows on mine 190.4 and the min shows 46.4 on mine. I use mine for work, I test concrete so I haven't had the chance to check out all the features. Sorry I couldn't be of more help.

Product features

Cooper-Atkins DPP800W MAX Digital Thermometer with Long Probe

When fully extended using the sheath, MAX measures a full 12" in length, keeping hands at a safe distance from a heat source.

Waterproof Thermometer

Long reach and extended probe make it easy to quickly read the temperature of anything you're cooking, on the grill or in the kitchen.

Perfect for reading temperatures of hot liquids on the stove or larger cuts of meat on the grill.

Product description

Easy to use, Reliable to use, High Efficiency. Easy to use, Reliable to use, High Efficiency. Easy to use, Reliable to use, High Efficiency.

User questions & answers

Question:	Is the item durable? - Is this item easy to use? - What are the dimensions of this item
Answer:	They have been pretty durable. Have only used 2 and none have broken. They are 12 inches long and smaller than a pen around. not sure on circumference. Snuggly fits in a rubber stopper.
Question:	Are these glass thermometers
Answer:	Yes. They are glass.
Question:	What is the diameter of the thermometer
Answer:	The diameter of the thermometer is very slightly out of round. It measures 0.241" to 0.244". The fluid bulb end is slightly tapered to 0.220". The very upper end was melted, slightly flattened and formed into an eye that can be used to hang the thermometer with a cord or wire. Max outside diameter of the eye is 0.250". Overall length is 11.75". I hope this helps. John Kerwin
Question:	Can these be used for dry temperatures? Looking at temperature variations to model global warming and the effect of albedo on temperature
Answer:	I purchased 10 of these thermometers 3 years ago. I've used two of them to measure my pool temperature. The other 8 have been in the kitchen pantry for 3 years now. I pulled them out and read each one. 4 of them were within 1 degree of each other, and were obviously measuring the ambient temp in my pantry (76F). My handling of the units could easily account for the 1 degree variation. The other 4 were measuring way LOW in the 50-60F range. Upon closer examination I noticed that the red alcohol indicator fluid on these 4 had separated with a section at the very top of the thermometer and the rest at the bottom of the thermometer. I don't know why this happened other than the whole package of thermometers was laying on its side for 3 years and has seen a lot of temperature fluctuations while in a strange orientation . I don't know if this will help to answer your question, but my personal belief is that these SHOULD be perfectly suitable to measure ambient air temps as well as liquid temps. Good luck. John in Lakewood Ranch, FL