The HVT-50U4S/AV3 from Yuanxing Electronics is a Voltage Transducer with Accuracy 0.01, Input Voltage 50 to 60 V, Output Voltage 1 to 10 V, Supply Voltage ±12, Temperature Operating Range -25 to 85 Degree C. Tags: DIN Rail Mount, DC Voltage Transducer. More details for HVT-50U4S/AV3 can be seen below.