Anfatec Instruments AG
Measurement Science and Technology &
Scanning Probe Microscopy

USB LockIn 250

250 kHz 2-phase LockIn Amplifier


The unique USBLockIn250 is a compact lock-in amplifier based on highest quality digital design.
Its parameters are comparable with the eLockIn203.
The control via USB-Interface allows to virtually connect an infinity number of USBLockIn250 to one PC.
Moreover, it can be simultaneously operated with PCI-Lockin Amplifiers AMU2.4.

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Parameters - Datasheet

  • 2-phase digital lockin amplification
  • < 10nV/Hz1/2, typical 2.2 nV/Hz1/2 @ 100kHz
  • User-friendly software interface
  • 10 nV to 10 V sensitivity
  • 1 µs time constant in sync mode
  • 10 µs to 5 s time constant in Butterworth filter mode
  • Roll-Off 6, 12, or 24 dB/oct
  • Remote control via USB 2.0
  • PLL input for external triggering: sine wave > 20 mV rms or TTL
  • IN: Sigma-Delta-A/D-converter with 20 MSPS sampling rate
  • 0.1 Hz up to 250 kHz, 135 dB dynamic reserve
  • Synchronous filtering over full frequency range
  • 14-bit Sine Wave Generation 0.1 mVrms to 7 Vrms
  • Spectra Acquisition up to 250 kHz (1 MHz)
  • Digital Results: float
  • Integrated PID Control
  • Two Auxiliary Analogue Outputs with up to 1 µs Group Delay up to 250 kSPS
  • Open source software examples and ready-to-use User Interface Software
  • 32/64Bit Windows Driver for Windows XP, 7, 10
  • Examples for Remote Control in Delphi, C, Python, Scilab, Matlab®



Manual for download here


List Price: 2670 €


USB LockIn 250 Frontside


remote control via USB
TTL input and output
2 analog output channels