2 best cheap motion sensor

They are cost-effective and work by detecting changes in heat or infrared radiation within their field of view. When motion is detected, they trigger an alarm or activate other security measures.

You can find standalone PIR motion sensor devices or ones that are part of larger security systems.

Wireless Motion Sensors:

Many affordable wireless motion sensors are available on the market. These sensors communicate with a central control panel or hub wirelessly, making installation easier and more flexible.
Some wireless motion sensors are designed for specific purposes, such as pet-immune sensors that reduce false alarms triggered by small animals.

Outdoor Motion Sensors:

Outdoor motion sensors are designed to monitor the exterior of your home. They are often used for security lighting, camera activation, or triggering alarms in response to outdoor motion.
Affordable outdoor motion sensors can be found in hardware stores and online retailers.

Smart Home Compatibility:

Some budget-friendly motion sensors are compatible with smart home platforms like Amazon Alexa or Google Assistant. These sensors can integrate with your existing smart home ecosystem for added convenience.

DIY Home Security Systems:

Many DIY home security systems offer affordable motion sensor components as part of their packages. These systems allow you to build a customized security setup without the need for professional installation.

Infrared (IR) Motion Sensors:

Infrared motion sensors are often used in security lighting and cameras. They are energy-efficient and can detect motion based on changes in heat signatures.
Budget-friendly IR motion sensors can be found in stores specializing in home security equipment.

Online Retailers:

Websites like Amazon, eBay, and Walmart have a wide selection of affordable motion sensors for home security.You can read customer reviews and compare prices to find the best deals.

When selecting a cheap motion sensor for your home security system, consider the specific features you need, such as indoor or outdoor use, range, sensitivity, and compatibility with your existing security setup. Additionally, make sure to follow the manufacturer's instructions for proper installation and placement to maximize the effectiveness of your motion sensor.

Below you can find our editor's choice of the best cheap motion sensor on the market

Philips Hue Indoor Motion Sensor for Smart Lights (Requires Hue Hub, Installation-Free, Smart Home, Exclusively for Philips Hue Smart Bulbs)

Philips Hue

Based on 2 reviews Check latest price

Product description

Make your Philips Hue experience even easier. Add a motion sensor to your Hue system and control your lights automatically. Battery powered and completely wireless, place the Hue motion sensor anywhere in your home. Simply walk by to trigger your lights. Ideal for use in hallways, stairways and middle of the night wake ups. Program lights to come on and off when activated. A great accessory for your Philips Hue Ecosystem.

The Philips Hue Smart Motion Sensor combines convenience and energy effeciency. Have your lights turn on when you walk into a room, and off when you leave. The Smart sensor detects optimum daylight levels to conserve energy during the day
During the night the Philips Hue Motion Sensor will switch to smart night light settings: a gentle, warm light setting to help you navigate during the night without disturbing your rest
The Philips Hue Motion Sensor can be placed freely for an optimal detection area, or mounted to a wall using screws (included). The device is battery powered, wireless and installation free (no re-wiring required) to control your lights without hassle
Place anywhere in your home including your hallway, bathroom, kitchen, and more. The integrated light sensor saves energy by detecting when rooms are vacant and automatically turning off lights
Installed in a minute. Simply follow the instructions in the Philips Hue app. Our smart lights default settings get you going, or personalize these settings to fit your needs
The Philips Hue motion sensor requires a Philips Hue bridge to make it part of your smart home lighting system. The Philips Hue system can control up to 50 smart lights
When you use the Philips Hue motion sensor with a Philips Hue bridge, you can use it to control any HomeKit compatible appliance

User questions & answers

Question:	Is there a way to use this for security? will it notify you remotely or ifttt when it senses motion
Answer:	Yes. I have mine pointed at my front door. Whenever it senses movement and I am not home (ie: my cell phone isn’t home) I get an alert on my phone. While it works for security, I also use it to know when maintenance is in my apartment, and it also triggers turning on the main lights. It’s all setup through iOS Home, so not sure about ifttt or Android. But definitely possible!
Question:	What is the minimum amount of time after leaving the room before the lights turn off
Answer:	There’s a setting in the app that says “when there is no motion after ___ minutes” the quickest setting is 1 minute. Then from there 2,3,5,7,10, and increments up to 60.
Question:	What's the difference between this one(473389) and the other one
Answer:	I have four Hue sensors– two in black boxes, two in blue boxes. The sensors in black boxes are not HomeKit compatible. The sensors in the blue boxes are. I don't know how that lines up with the product numbers.
Question:	What's the battery life on this? Does the amount of traffic affect how long the battery last
Answer:	Pretty much the shelf life of the battery. It's been more than three years since I bought the 1st gen and it's working just fine to trigger a garage and entry hall - and it has been well over 110 in that area for much of this past summer. I've not pulled the patent applications nor reverse engineered it but the circuit stays low (the least amount of power consumed) during the period consisting of daylight or other room lights on. I my case I'd bet that the sensor is consuming current for six hours a day for nearly 1,000 days.

BOSCH SECURITY VIDEO DS150I Motion Sensor (NA)

BOSCH SECURITY VIDEO

Based on 23 reviews Check latest price

Product description

Series consists of the DS150i Detector (lightgray) and the DS151i Detector (black). They arespecifically designed for Request-to-exit (REX)applications. The DS150i and DS151i detect motion intheir coverage area and signal an access control system ordoor control device