Keithley Instruments Inc.

Scientists worldwide use our electrometer, pico-ammeter, nanovoltmeter and other sensitive measurement solutions in applications from nanotechnology and superconductivity research to temperature measurements and HALT-HASS characterization. Whether you need to make fast, low-noise measurements of femtoamps, nanovolts, or mega-ohms, you’ll find a cost-effective solution here.


The AVM-2000 is a multi-range analog DC Voltmeter/Null Detector. It has 21 bipolar ranges from ± 100 nanovolts full scale to ± 1000 volts full scale in a 1-3-10 sequence. The AVM-2000 functions either as an isolated null detector or as an isolated analog voltmeter.