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QCM922A Quartz Crystal Microbalance

Princeton Applied Research (Ametek)

Quartz Crystal Microbalance

The new Princeton Applied Research QCM922A is a next generation quartz crystal microbalance for piezoelectric gravimetry in the ng-µg regions for monolayer weight change analysis.

Used together with a potentiostat / galvanostat, the QCM922A (with the Pt or Au coated resonator serving as the working electrode) provides simultaneous information on:

  • Potential
  • Current
  • Charge
  • Resonant frequency (mass)
  • Resonant resistance (viscosity)

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Quartz Crystal Microbalance Brochure

Quartz Crystal Microbalance QCM922A


  • Electrochemical depositions
  • Polymer films
  • Corrosion
  • Absorption
  • Electrochemical reaction mechanisms
  • Battery research, electroplating and biosensor development


  • Sensitive enough to measure monolayer weight changes
  • Quantify both elastic and viscous changes
  • Front panel display of resonant frequency and resistance changes
  • Frequency range 1MHz – 10MHz
  • Lightweight and small footprint

The QCM922A Quartz Crystal Microbalance monitors both the resonant frequency and resonant resistance of a Pt or Au coated AT-cut quartz crystal. Resonant frequency changes with the effective surface mass on the crystal, and resonant resistance changes with the viscosity of the material interfacing with the quartz crystal surface.

New Features

  • Higher sensitivity measurements with 30 MHz design (with compatible resonators)
  • Admittance testing
  • More convenient – smaller footprint  (16 x 160 x 95 mm) and lighter weight (~1.2 kg)
  • USB connectivity

Improved Functionality

  • Improved resolution on mass change from 1 ng/Hz to 0.1 ng/Hz (factor of 10x improvement)
  • Improved frequency resolution from 0.1 Hz to 0.01 Hz (factor of 10x improvement)
  • Improved resolution on delta F Output from 12 bit to 14-bit (factor of 4x improvement)
  • Improved resolution on delta R Output from 11-bit to 14 bit (factor of 8x improvement)
  • Improved gate time response from 20 ms to 10 ms (factor of 2x improvement)
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