Martel MiniCalibrator 4-20 mA

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calib1-2
$80

Matel MS-20 4-20 mA Portable Calibrator

 

Five high-accuracy outputs can drive up to 300 ohms using a 9-volt battery, or act as a 2-wire simulator with up to 30 vdc supply.

 

See photos of output into a 6-1/2 digit multimeter.