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The Keithley 428 Current Amplifier features a fast 2 µs rise time, ultra-low 1.2 fA RMS noise, and adjustable gain up to 10¹¹ V/A. It offers nine gain ranges from 10³ to 10¹¹ V/A with selectable rise times ranging from 2 µs to 300 ms, leveraging a sophisticated feedback current circuit for unmatched speed and low-noise performance. Connectivity is streamlined with BNC input/output and an included IEEE‑488 interface.
It excels at converting small, fast currents into voltage signals suitable for oscilloscopes, data acquisition systems, or waveform analyzers. Features like ZERO CHECK, OFFSET, and current suppression up to 5 mA ensure precision and flexibility in diverse test environments.
Testwall can supply the used Keithley 428 Current Amplifier, 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 428 Current Amplifier.
Returns
If you are not completely satisfied with your purchase, simply return the item to us in its original condition within 30 days of receipt.
Returned items should be unused and must be returned in original packaging with any enclosed documentation. We will issue a full refund on receipt, excluding the original delivery charge. Alternatively, if preferred, we will exchange the item.
VAT
Prices exclude VAT. Intra-Community transactions: Under the EU VAT Directive, B2B sales of goods across EU VAT borders is VAT zero-rated.
Where VAT is charged, a rate of 23% is applied.
VAT is not charged outside of the EU.
