Loop Calibrator, Source Current 0 to 20mA DC, Current Measurement Range 0 to 24mA DC, Current Accuracy +/- 0.01 Percent +/-2 Digits, Voltage Measurement Range 0 to 30V DC, Loop Supply Voltage 24V DC, Max. Loop Current 20mA DC, Display LCD, Standards EN61326 Annex A, Calibration Certificate NIST with Data, Powered By (6) AAA Batteries. This item has been restricted from sale in the following state (s): []