Keithley 2182a e two channel nanovoltmeter keithley 2182a e p the keithley 2182a e is a two channel nanovoltmeter that has been optimised for making stable low noise voltage measurements and for characterising low resistance materials and devices reliably and repeatably the 2182a e provides a higher measurement speed and significantly better noise performance than alternative low voltage measurement solutions p p the 2182a e represents the next step forward in keithley nanovoltmeter tec