Contact/door sensors: These consist of two separate sensor units traditionally, you place one sensor on the door frame and put the second sensor on the door.Some sensors have on-screen displays that show the current temperature and humidity levels, while others relay that information in their manufacturer’s app. Temperature sensors: These models detect ambient temperature and humidity levels and are typically meant for indoor use.Most can sit on a shelf or some other flat surface, though some can physically attach to a surface or are designed to fit into a room’s corner for maximum coverage. Motion sensors: These sensors rely on infrared to detect motion within a field of view.The Aqara Door and Window Sensor is the best contact sensor, thanks to its best-in-class response time and compact size. The Centralite Temperature and Humidity Sensor works well and is compatible with many Zigbee-based hubs. The Aqara Motion Sensor P1 is the best motion sensor due to its straightforward installation process, versatile stand, and quick, reliable performance. You can find a range of sensor types, but for this guide we tested the most generally useful types in three categories: motion, temperature, and contact. A contact sensor can trigger lights to turn on whenever you open the shed door, for instance, or set off an alarm when your teen sneaks into the snack pantry. One that detects humidity, for example, can automatically turn on a humidifier if a baby’s nursery gets too dry. Smart sensors are essentially helper devices for your existing system when you set them up as triggers for other smart devices. Most sensors can stay connected within a typical multistory home but may struggle if you have an especially large home or want to use devices in a detached garage or barn.
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