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HF2LI

50 MHz Lock-in Amplifier

Key Features

  • Analyze, generate and control from DC to 50 MHz
  • Precisely measure two differential voltage signals
  • Demodulate up to 6 harmonics simultaneously
  • Fast measurement time and low noise floor
  • Configurability with multiple auxiliary input/outputs
  • LabOne® toolset including Scope, Sweeper, and Spectrum Analyzer
  • Expand your toolset with upgrade options

Discontinued

This product is not available anymore.

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The product is discontinued. It has been replaced by the VHFLI Lock-in Amplifier.

The Zurich Instruments HF2LI is a digital lock-in amplifier covering the frequency range between DC and 50 MHz. It is the instrument of choice for the characterization of MEMS devices such as gyroscopes and for measurements in the area of microfluidics. The HF2LI is equipped with the Zurich Instruments control software LabOne, which provides a web-based user interface featuring a spectrum analyzer, a sweeper and a basic oscilloscope, among others. A number of upgrade options can extend the functionality of the HF2LI to adapt to different applications. Furthermore, combining the HF2LI with the HF2TA Current Amplifier enables direct current readout.

Related Publications

M. Houot, Z. Qiao, B. Hu, D. Nodari, F. Furlan, F. Aniés, Y. Yang, M. Heeney, A. A. Bakulin and N. Gasparini

The Dynamics of Interfacial Trap States in High-Detectivity Near-Infrared Photomultiplication Organic Photodetectors

Advanced Functional Materials

DOI: https://doi.org/10.1002/adfm.202518210

Matilde Brunetta et al.

Selective Charge Extraction Allows Fast Photomultiplication and Imaging in Rigid and Ultra-Flexible SWIR Organic Photodiodes

Advanced Energy Materials

DOI: https://doi.org/10.1002/aenm.202506776

Valentin Fonck, Mohammadali Razeghi, Jean Spiece, Phillip Dobson, Jonathan Weaver, George Ridgard , Grayson Noah and Pascal Gehring

Characterization of Heat Transfer in 3-D CMOS Structures Using Sideband Scanning Thermal Wave Microscopy

IEEE Xplore

Link to paper

Ma, H., Chen, Y., Qiao, S., He, Y., & Ma, Y.

A high sensitive methane QEPAS sensor based on self-designed trapezoidal-head quartz tuning fork and high power diode laser

Photoacoustics 42, 100683 (2025)

DOI: https://doi.org/10.1016/j.pacs.2025.100683

Zhiyu Feng a,b , Chaotan Sima a,b,* , Tailin Li a,b, Wenzhe Wang a,b, Yufeng Pan a,b, Lihua Wang c, Zhiwen Ming d, Ping Lu

Highly-sensitive photoacoustic gas sensor with dual resonant modalities for simultaneous NO and NO2 detection

Sensors and Actuators B: Chemical, Volume 434, 1 July 2025, 137596

DOI: 10.1016/j.snb.2025.137596

HF2LI-MF

Multi-Frequency Option

Zurich Instruments HF2 MF Multi-frequency

Key Features

  • Signal input switch matrix for all 6 demodulators
  • Arbitrary frequency for all 6 demodulators
  • Oscillator switch matrix
  • Individual demodulator filter settings (slope and time constant)
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HF2LI-MOD

AM/FM Modulation Option

Zurich Instruments HF2 MOD AM/FM Modulation

Key Features

  • Simultaneous amplitude modulation and demodulation
  • Simultaneous frequency modulation and demodulation
  • Dual-demodulator (input) and dual-modulator (output) configurations
  • Harmonic analysis
  • Sideband separation (single-sided modulation)
  • Support for bimodal and multi-modal modulation for AFM
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HF2LI-PLL

Dual Phase-Locked Loop Option

Zurich Instruments HF2 PLL Phase-Locked Loop

Key Features

  • Dual programmable digital PLL
  • PLL bandwidth programmable over a wide range
  • PLL Advisor (for adjustment of target bandwidth)
  • Configurable phase detector and PID controller
  • Best-in-class harmonic input and harmonic output distortion
  • Output of frequency deviation on auxiliary output connectors
  • Fully integrated with dual-unit lock-in amplifier
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HF2LI-PID

Quad PID Controller Option

Zurich Instruments HF2 PID Quad PID Controller

Key Features

  • 4 fully programmable PID controllers
  • PID Tuner and PID Advisor with 4 simulation models
  • Flexible setpoint configuration: toggle, external, manual, cascaded
  • Anti-windup
  • Arithmetic Unit
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HF2TA

50 MHz Current Amplifier

hf2ta frontal

Key Features

  • 50 MHz frequency range
  • 2 independent amplification channels
  • Wide range of precision transimpedance gain settings (100 V/A to 100 MV/A)
  • Integrated offset adjustment and compensation
  • Low noise and low input leakage
  • Bias output for sensor power
  • Dedicated interface to HF2 instruments (no direct PC link)
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