Clamp style split core current sensor, AC input jumper to select scale from 10A, 20A, 50A.Output is proportional 0-5 VDC Features: Self powered, no external power supply required.0-5VDC output, connects directly to automation systems.One sensor for three ranges, jumper selection.Low cost, replaces digital status relays. The CS Current Sensors are solid state transducers that do not need any external voltage. Perfect for measuring current of fans, compressor, pumps and may other HVAC equipment. The clamping/split core configuration allows for easy installations without interrupting the high voltage wiring. If input current is very low and more sensitivity is required, it is possible to add a second or third wrap of the high voltage cable to double or triple the output signal for a given current. Full range of measurement is set by the jumper positionOutput is always 0 to 5 VDC according to the maximum range selected by the jumperEx: Output Signal: 1~5VDC; proportional to average currentIf the Jumper is removed, the CT will have a range of 0-10Amp with an output of 0 to 5Vdc in this setting 5 VDC = 10Amp If the Jumper is set to 0-20Amp the maximum output of 5 VDC = 20AmpIf the Jumper is set to 0-50Amp the maximum output of 5 VDC = 50AmpTech sheetWire: 150mm, 600V, 20gaDimensions : 33mm wide x 35mm long x 48mm highBase : 53mm long 32mm wide ( 2 x 6mm holes spaced 45mm)Output 0-5VDC 250maArrow on case: Pointing towards the loadWire polarity: Red positive, black negativeFrequency range: 50 to 60 Hz ( tested to 400hz )Power Supply: Not required powered by loopOperating Temperature: -20 ~ 60 COperating Humidity: 0 ~ 95% RHCT Ranges: 10, 20, 50Amp, jumper selectedOutput Signal: 1~5VDC; porportional to average currentAccuracy: 2%CT Material: ABS (UL94) Plastic housing: Flammability rating UL94V0 file E194560