Elektrométer erősítő, mágneses

Measurement accessory for detecting very small charges;
used, in combination with a measuring instrument having a range of 3 V or 3 mA, as an electrometer;
"IN"- safety jack for connecting a conducting sphere with plug;
grounding jack;
reset button; ON / OFF switch;
two safety jacks for connecting a measuring instrument;
LED displaying operating mode;
input voltage 12 V DC through hollow jack, supplied by external power supply 12 V / 2 A, P3130-1P;
dimensions: approx. 84 x 84 x 39 mm