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FAQ Category

Sensors, Sirens & Doorbells

29 public pre-sale articles.

Alarm

Can a wireless siren work alone? Some sirens need remote/sensors or an alarm system to trigger. Can this siren connect to WiFi by itself? Not all sirens support WiFi. Can sensors trigger phone notification? Yes if the sensor is online and app notification is enabled. Can I use sensors for a simple home alarm system? Yes, with a compatible alarm hub/siren setup.

Automation

Can a sensor trigger a smart switch? Yes, if both devices are compatible in the same automation platform.

Battery

How long do sensor batteries last? Battery life depends on usage frequency, signal strength and battery type.

Compatibility

Can Zigbee motion sensor work without internet? Local Zigbee detection may work with gateway, but app/cloud features need internet. Can sensors be used with Home Assistant? Some Zigbee, Matter or supported WiFi sensors can be integrated.

Doorbell

Can I buy extra chime only? Extra chime works only with compatible button/set. Can one doorbell button pair with multiple chimes? Many wireless doorbells support this, but check model compatibility. Can one chime pair with multiple doorbell buttons? Some models support multiple buttons. Is the wireless doorbell waterproof? The outdoor button may be weather-resistant, but check IP rating.

Door Sensor

What is a door sensor used for? It detects whether a door or window is opened or closed. Does a door sensor need a gateway? WiFi sensors may not need gateway; Zigbee sensors need compatible gateway.

Gateway

Why does my Zigbee sensor need a gateway? Zigbee devices do not connect directly to WiFi. Can I use any Zigbee gateway with any Zigbee sensor? Not always; ecosystem compatibility matters.

Installation

Where should I install a motion sensor? Install at recommended height with clear view of the detection area. Where should I install a door sensor? Install one part on the door and one part on the frame, aligned closely.

Motion Sensor

What is the difference between PIR motion sensor and presence sensor? PIR detects movement, while presence sensors can detect smaller micro-movements depending on technology.

PIR Sensor

Does a PIR sensor work in complete darkness? Yes, PIR detects infrared movement, not visible light. Can PIR sensor detect pets? It may detect pets unless the model has pet immunity.

Presence Sensor

What is a 24GHz radar presence sensor used for? It detects human presence and micro-movement more accurately than normal motion sensors. What is the detection distance of the 24GHz radar sensor? Your WBET-08 has straight detection around 8–10m and radius around 4–5m. Does the radar presence sensor need neutral wire? Check wiring type; WBET-08 supports 3-wire/4-wire installation. Can the radar sensor work with lights directly? Yes, if the load is within rating. Does the radar sensor have light sensor? Yes, WBET-08 has light sensor setting below 30 lux based on your notes.

Smoke/Gas Sensor

Can smart sensors replace certified safety alarms? Do not rely only on smart notifications for life safety.

Temperature Sensor

Can temperature sensor trigger air conditioner automation? Yes, a temperature sensor can trigger scenes, but the air conditioner usually still needs a WiFi universal IR remote or compatible smart aircon controller to receive the command.

Water Leak Sensor

What is a water leak sensor used for? It alerts when water is detected at the sensor probe.