WSG Wireless Room Temperature SensorWSG Wireless Room Temperature Sensor The Wireless Room Temperature Sensor is used exclusively with the WSG30 system to measure ambient air temperature wherever the sensor is installed. When the temperature falls outside of the WSG30 systems programmed high or low limit, the user will receive an alarm via text message or email. The sensor includes two AA alkaline batteries which will power the sensor for up to two years. An optional plug in power