WSR-0101 Wireless Dry Contact Sensor for Use with the Sensaphone 2800 Monitor
Monitor a dry contact: know if it is open or closed. Sensaphone Remote Dry Contact Sensor WSR-0101 used with the Sensaphone 2800 (not included) allows for remote equipment monitoring. WSR-0101 Wireless Indoor Dry Contact sensor includes a built-in
radio transmitter and input terminals for connecting to any normally-open or
normally closed output. (Use with solid-state outputs is not
recommended.) Sensor includes 3 AAA alkaline batteries for power up to 3 years. Option: plug-in power supply so batteries back up if AC fails.