SRS lock in amplifier

SR8 series lock-in amplifiers

High performance lock-in amplifiers suitable for accurately detecting and measuring small AC signals.

Supplier: Stanford Research Systems

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Technology type: Lock-in Amplifiers

Lock-in amplifiers are used to detect and measure very small AC signals  all the way down to a few nanovolts. Accurate measurements may be made even when the small signal is obscured by noise sources that are thousands of times larger.

Lock-in amplifiers use a technique known as phase-sensitive detection to single out the component of the signal at a specific reference frequency and phase. Noise signals at frequencies other than the reference frequency are rejected and do not affect the measurement.

SRS lock-in amplifiers provide high performance at a reasonable price.

For range details, please see the catalogue in the downloads section below.

Range features

A high level overview of what this range offers


  • Single phase/dual phase
  • > 100 dB dynamic reserve
  • 10 µs to 30 ks time constants
  • Auto-gain, -phase, -reserve, -offset


  • 25 kHz to 200 MHz measurement range
  • 80 dB dynamic reserve
  • Internal reference source


  • DSP dual phase
  • 1 MHz to 102.4 kHz measurement range
  • > 100 dB dynamic reserve
  • Data logging and analysis


  • 500 kHz/4 MHz
  • Low noise current and voltage inputs
  • Data logging and analysis
  • Differential source


  • Single phase/duals phase
  • 0.5 Hz to 100 kHz measurement range
  • Up to 80 dB dynamic reserve
  • Tracking band-pass and line filters


  • Single phase/dual phase
  • Low noise, all analog design
  • 0.2 Hz to 200 kHz measurement range
  • Low noise current and voltage inputs
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