Quartz Monitor Crystals

Research Crystals 1 inch (25.4mm)

Maximum stability in demanding applications


Product configurator

Gemini™ MxG5xx

Sensor version
Ionization chamber
Emmision current
Flange connection to vacuum chamber
Switching function
Electrical connection
Digital interface
Analog output signal
Your configuration
Gemini™ MxG5xx
Switching functions
Electrical Connection
FCC, 8-pin
Digital Interface
Measurement range
1.2 - 8.68 V
Personal information
Gemini™ MxG5xx
Gemini™ MAG500
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The standard AT-cut, 1 in. (25.4 mm) diameter crystal, pioneered by INFICON, is used primarily in research applications with the INFICON RQCM (Research Quartz Crystal Microbalance). These research crystals are designed for use with INFICON rugged, easy to use crystal holders and are used for in-situ monitoring of deposited films or liquids.


AT-cut quartz has superior mechanical and piezoelectric properties. The 1 in. (25.4 mm) diameter allows optimal distance between the active area of the crystal and the mounting o-ring. This improves the overall stability of the crystal by reducing the frequency changes due to mounting stress.


INFICON 1 in. (25.4 mm) research crystals are available with either an unpolished or polished finish. Polished crystals allow for a good correlation between theory and measurement during liquid immersion experiments.

Electrode Material

INFICON 1 in. (25.4 mm) research crystals are available in a variety of electrode materials including Gold, Platinum, and Titanium. Crystals with custom electrode materials are available on request. INFICON also offers Gold electrode crystals with an additional SiO2 outer layer to create a hydrophilic surface needed for some biological applications.


Even though AT-cut crystals are designed to minimize the change in frequency due to temperature, the effect of temperature can be significant when attempting to resolve small mass (frequency) changes over long periods of time. INFICON offers AT-cut crystals optimized for two operating temperatures, 90ºC and 25ºC. These crystals have very good frequency stability when operating close to their specified temperature.

Contact us today to request a quote for custom crystals to accommodate your special requirements.


  • Accurate
  • Reliable
  • Stable
  • Wide variety of electrode materials available

Typical applications

  • Metal plating
  • Gas-phase mass detection
  • Electro-chemistry
  • Micro-rheology
  • Protein adsorption/desorption
  • Biofilm formation


5MHz Crystals
9MHz Crystals
Frequency Range4.976 - 5.020 MHz
Crystal Diameter1 in. (25.4mm)
Front Electrode Diameter0.5 in. (12.7 mm)
Surface Roughness50 Å(polished)
Frequency Range8.976 - 9.036 MHz
Crystal Diameter1 in. (25.4mm)
Front Electrode Diameter0.5 in. (12.7 mm)
Surface Roughness50 Å(polished)
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