The WSG30 Wireless 4-20mA sensor is designed to work exclusively with
the Sensaphone WSG30 (not included) . This sensor includes a built-in radio transmitter,
4-20mA input and a 24V loop power supply. Use this wireless sensor monitor the output of any 4-20mA transducer. The sensor comes with a
plug-in power supply and three AA alkaline batteries which will power
the sensor for several hours if main AC power fails.Made by Sensaphone.