Stanford Research SR555 Current PreamplifierRefurbished
The SR555 Current Preamplifier is a low-noise, high-bandwidth, fixed-gain current (trans-impedance) amplifier designed to work with SRS lockin amplifiers. Current amplifiers provide gain close to the experimental detector, allowing the user to minimize input cable length and its corresponding input capacitance. The SR555 minimizes noise and pickup before they permanently degrade the signal-to-noise ratio, reducing measurement time in noise-limited experiments.
- 10 V/µA fixed gain
- 120 kHz bandwidth
- Bias voltage input
- Powered by SRS lock-in amplifiers