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Maximum stability in demanding applications 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. Geometry 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. Finish 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... Frequency Range:4.976 - 5.020 MHz Resistance:~10 Ohms Crystal Diameter:1 in. (25.4mm) Crystal Contour:Plano-Plano Crystal Orientation:AT-Cut, for frequency stability over temperature Compatibility:INFICON/Maxtek liquid probes and crystal holders Front Electrode Diameter:0.5 in. (12.7 mm) Packaging:Individually packaged/sold Crystal Thickness:0.013 in. (333µm) Surface Roughness:50 Å(polished)

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