Keithley
Keithley 642
Electrometer, 10aA - 200nA
Electrometer Instrument Type
100 mV to 100 V Voltage Measurement Range
100 fA to 1 mA Current Measurement Range
10 pC to 1 µC Charge Measurement Range
Greater than 200 TΩ Input Impedance
| Attribute | Value |
|---|---|
| Instrument Type | Electrometer |
| Voltage Measurement Range | 100 mV to 100 V |
| Current Measurement Range | 100 fA to 1 mA |
| Charge Measurement Range | 10 pC to 1 µC |
| Input Impedance | Greater than 200 TΩ |
| Minimum Current Detectable | 1 fA |
| Display | 3.5-digit LED display |
| Power Requirements | 105–125 V or 210–250 V AC, 50/60 Hz |
| Operating Temperature Range | 0°C to 50°C |
| Interface/Connectivity | IEEE-488 (GPIB) Interface |
Keithley 642 Options:
- 642 - 642 - Electrometer
- 642 - 642 LNFPA - Electrometer, <50µV p-p noise, fast 10⁻¹¹A range
- 642 - 642 LNFPA/6423 - Electrometer, <50µV p-p noise, fast 10⁻¹¹A range with IEEE-488 Output
| Model | 642 |
|---|
The Keithley 642 is a MOSFET-based electrometer offering ultra-sensitive current, voltage, and charge measurements. With a 10aA sensitivity, 22ms response on 10^-10A, and 10µV–10V voltage range, it ensures top precision. It measures charge from 800aC–100pC and provides up to 20,000:1 resolution on digital output.
It features wide dynamic range, feedback output with low noise, and sealed remote head design to maintain low humidity.
Testwall can supply the used Keithley 642, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keithley 642.
