Keithley 428-MAN current amplifier

Keithley 428-MAN rev.B02 for sale.

The Keithley 428 Current Amplifier converts fast, small currents to a voltage, which can be easily digitized or displayed by an oscilloscope, waveform analyzer, or data acquisition system.

The 428 uses a sophisticated “feedback current” circuit to achieve both fast rise times and sub-picoamp noise.

The gain of the 428 is adjustable in decade increments from 10E-3 V/A to 10E-11 V/A, with selectable rise times from 2 µs to 300 ms.

The 428 offers fast response at low current levels, which is unmatched by either electrometers or picoammeters.

The nine current amplification ranges allow the greatest flexibility in making speed/noise tradeoffs.