# 428 Keithley Amplifier Other Used

**Features:**

-   2μs rise time
-   1.2fA RMS noise
-   Up to 1011 V/A gain
-   IEEE-488 interface

This 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.It uses a sophisticated feedback current circuit to achieve both fast rise times and sub-picoamp noise.

## Details

- **Price:** 4995.0 USD - 5314.0 USD
- **Vendor:** Keithley
- **Type:** Amp Oth
- **Tags:** Amplifier, Keithley, Manufacturers, Other, Other Equipment, product_manual_group_1, Product_used

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| None | 4995.00 USD | In stock |
| NIST Traceable | 5144.00 USD | In stock |
| ISO IEC 17025 Accredited | 5314.00 USD | In stock |

## Images

- 428 Keithley Amplifier Other Used

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> Source: [ValueTronics](https://valuetronics.com/products/428-keithley-amplifier-other-used)
> Updated: 2026-05-21