VEGATOR 537 Ex Double signal conditioning instrument for level signalling in 19" European size For processing of vibrating level switches - With adjustable integration time - Fault monitoring and fault signal - With test key for function test according to WHG - European size according to DIN 41494 Sensor input : 2 x (vibrating level switches) Relay output : 2 x spdt Transistor output : 2 x Fault signal : 1 x relay and 1 x transistor Switching hysteresis : fixed Protection : IP30 Operating voltage : 20...53V AC, 20...72V DC Approval ATEX II (1) GD [EEx ia] IIC/IIB + WHG