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 10-3 V/A to 10-11 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.
Keithley 428 Current Amplifier and other Current Amplifiers / Current Probe Amplifiers for sale at Test Equipment Center.
Keithley 428 products for sale at Test Equipment Center are thoroughly tested, and receive electrical and cosmetic reconditioning as needed prior to sale. All products include a 90 day warranty from Test Equipment Center to ensure your complete satisfaction.
Test Equipment Center sells used Current Amplifiers / Current Probe Amplifiers and Laboratory Test Products from Keithley and many other test equipment manufacturers.
Test Equipment Center - New and Used Test Equipment Sales
Buyer's Assurance Program - Test Equipment Center's strong technical service capabilities ensure meaningful warranty support is included for every item sold, protecting buyers in the rare case where a product failure occurs. Our technical service laboratory also offers repair support for many products purchased from other suppliers, inquire for details.
We Buy Test Equipment - Whether you have one item, or an entire warehouse to liquidate, Test Equipment Center offers a program to turn your test equipment assets into cash or trade-in credit for future purchases. Our trade-in, purchase, and consignment options are designed to return maximum value for your surplus assets.
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2 uS Rise Time 
