Keithley 642

Keithley 642

Digital Electrometer

The Keithley 642 is a refurbished Digital Electrometer.
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Current range, 10 aA to 200 nA with less than 1mV burden. Voltage range, 10 uV to 10 V with 10,000 T input. Charge, 800aC to 100pC.