EQCM - Quartz crystal microbalance

eQCM Quartz Crystal Microbalance

Gamry’s eQCM 10M

is a rapid, impedance-scanning electrochemical quartz crystal microbalance (EQCM) compatible with any Gamry Reference or Interface Potentiostat. The EQCM adds a valuable tool in the analytical toolbox of anyone investigating interfacial processes. Corrosion, ion intercalation, ion adsorption, polymer growth, and sensor binding events are all interfacial processes that produce mass changes.  These mass changes can be measured by monitoring the resonant frequencies of an oscillating quartz crystal.  

eQCM Product Details

The eQCM 10M is a versatile electrochemical quartz crystal microbalance (EQCM) that accommodates any crystal from 1-10 MHz in any cell or holder.  Its resolution allows you to detect mass changes on the ng/cm2 scale. This is less than a monolayer of material!  Our system comes with everything you need to get started – the eQCM 10M, 5 MHz Au-coated crystals (5x), static cell, cables, manuals, and software.

eQCM 10M Features

  • Any crystal from 1-10 MHz in any cell
  • Detect ng/cm2
  • USB Interface
  • Integrated QCM and Gamry Potentiostat acquisition
  • Impedance scanning gives both ƒs and ƒp, the series and parallel resonant frequencies
  • Data Analysis in Gamry’s flexible and customizable Echem Analyst™

eQCM Applications

  • Electroactive Polymers
  • Li+ Intercalation
  • Corrosion Studies
  • Electrodeposition
  • Self-Assembled Monolayers
  • Antibody-Antigen Interactions
  • Surfactant Adsorption
  • Protein Adsorption
  • Ion and Solvent Transport

The eQCM 10M rapidly scans a frequency window around the two resonant frequencies (these resonant frequencies are explained in our Basics of an eQCM App Note).  The advantage of scanning through the two resonant frequencies is that you no longer need to cancel the parasitic capacitance in order to maintain oscillation.  Additionally, the relative impedance spectrum is displayed each time a data point is acquired, giving you insight into bubble formation on your electrode or improper cell setup.  Having the two resonant frequencies also allows you to qualitatively see dissipation changes.  When ƒs and ƒp respond similarly your film is rigid, however, when ƒs and ƒp respond differently the film is not rigid. 

Resonator also allows you to adjust the driving amplitude of the crystal.  This is especially important when working in an ionic liquid (IL) or a viscous solution where damping is especially high. The ability to manually increase the driving amplitude for heavily-loaded crystals offers a significant advantage over straight dissipation or time-resolved techniques. 

Data analysis is done in our flexible and customizable Echem Analyst™.  We give you a variety of plotting options to allow you to display the data as you want.  You can plot straight mass change versus time, mass versus charge, mass versus potential, or a basic form of dissipation versus time. 

Cleaning Crystals

A note about cleaning QCM crystals. We typically think of crystals as one-time use items but if you need to clean them, Pirhanna solution (the acidic one) and can work well but take all of the necessary precautions when dealing with this solution. It is very dangerous and you should consult an MSDS and have proper safety training before using. 

eQCM Specifications


Range 1– 10 MHz
Resolution 0.02 Hz


Operating Temperature Range 0 to 45°C
Relative Humidity Maximum 90 (non-condensing)%
Storage and Shipping Temperature -25 to 75°C
Maximum Shipping Acceleration 30G


Power Input Voltage Range 10 to 14 Volts
Power 25W
Dimensions 175x 115x 80 mm
Weight 1 kg
Dimensions of External Power Adapter 120 x 55 x 30 mm
Weight of External Power Adapter 40 grams

A PHE200 or Global license is necessary to have Resonator control any Gamry Reference or Interface potentiostat in version 6 of the software.  No additional license is required in version 7 of the software.

System Requirements

  • USB 2.0 Port
  • Microsoft® Windows™ XP SP3/Vista/7/8/10 (32-bit or 64-bit)


eQCM Images

eQCM Manuals

eQCM Accessories

Accessories for the eQCM include:

5 MHz Crystals (Pack of 5) 
The crystals below have a nominal electroactive area of 1.1 cm2 and a nominal area of overlap of 0.24 cm2. These crystals all have a Ti underlayer to improve adhesion. 

The following 10 MHz crystals are for the discontinued Teflon Static Cell:
The crystals below have a nominal electroactive and area of overlap of 0.21 cm2.  These crystals all have a Ti underlayer to improve adhesion. 


Makes my research data collection easy!

Rating: 3.3 3.30 Out of 5 Stars

Organization: University of Houston

Application Area: Determine Mass loading of Surfaces

"This instrument is easy to setup and use. It provides reliable results for even small mass loading of samples."

Great equipment

Rating: 4.0 4.00 Out of 5 Stars

Organization: University of the Punjab, Lahore, Pakistan

Application Area: electrochemistry

"Good results obtained. No such equipment in market available. "

Excellent service and easy installation

Rating: 5.0 5.00 Out of 5 Stars

Organization: University of Wisconsin-Platteville

Application Area: characterization of polymer film

"Great product and reliable measurement. It was purchased a year ago and it is still running well. I have seen many literature publishing the results with the unit I have purchased. It is a very useful tool for undergraduate research as it is not easy to break and data analysis is pretty simple."

Results are consistent. I can use device on many novel applications

Rating: 4.3 4.30 Out of 5 Stars

Organization: Pamukkale University

Application Area: detecting bio molecules and conducting polymer applications

"My research interest is mainly on conducting polymers and their applications. Device gives consistent results. I am very satisfied with using it my research. I am doing novel research with such a cheap device. I am very happy for having this device. Thank Gamry Instrument. Really great job. "

Good results

Rating: 4.3 4.30 Out of 5 Stars

Organization: University of the Punjab, Lahore, Pakistan

Application Area: Electrochemistry

"Product is effective. Easy to use equipment. Data reproducibility is good."

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