Portable 4-20mA Calibrator/Tranceiver

420: Portable 4-20mA Calibrator/Tranceiver Ideal companion for any and all 4-20mA current loop applications. It’s a transmitter for calibration for meters/receivers and also a receiver for calibration of transmitters; it can sustain burden of up to 1,000 Ohms. It’s powered by a 9 V battery.