The Cassia™ EMS Door Sensor consists of a base (containing the Zigbee radio, magnetic sensor, and battery) and a separate magnet. The Door Sensor signals the thermostat when the door is opened. The thermostat combines door switch signals with PIR Motion Sensor signals to determine whether a room is occupied or unoccupied.
The door sensor uses a CR-2 lithium battery.
Double sided adhesive tabs are provided for easy mounting