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:
- Resonant frequency (mass)
- Resonant resistance (viscosity)
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.
- 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 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)