Twin-CQCM Sensor

High-Precision, High-stability Measurement in Cryogenic Environments

The Twin-COCM is a QCM sensor capable of cryogenic temperature control down to -196°C through liquid nitrogen cooling.
Two quartz crystals—one for measurement and one as a reference—compensate for temperature fluctuations, enabling stable detection of mass changes.
Combined with 1-channel or 4-channel controllers, it supports flexible system configurations tailored to specific objectives.

Features

Ultra-low temperature measurement from -196°C to +125°C

High-stability temperature control via liquid nitrogen cooling

Highly stable measurement enabled by a 2-channel configuration for measurement and reference

Compliant with ASTM E1559/E2900 testing

Temperature Stability in Ultra-Low Temperature Environments

Even when temperatures vary from -196°C to +125°C, the difference between the detection electrode and reference electrode remains within ±6 pm of true value.

【 Frequency Temperature Characteristics of Modules 】

Frequency fluctuation of each electrode is 800 ppm or more.
Within ±6ppm by taking the difference
Effect of temperature fluctuation 1/100 or less

Customization Options

Customization options such as the following are available depending on your application and installation conditions.

Expanding outgas capture range by adjusting the angle of the cover opening

Modifying the module structure to suit chamber conditions

Changing cable length and connection connectors

Modifying software analysis functions and control specifications

【 Customization Examples 】

Specification

Twin-CQCM Sensor Module	PSA-QM-1001
Output Frequency	10.278MHz(Fundamental) /30.833MHz(3ot)
Mass Sensitivity	2.39x10⁸ (Hz/g)cm²(Fundamental) 7.17x10⁸ (Hz/g)cm²(3ot)
Frequency Sensitivity	0.53ng/Hz　(Fundamental) 0.18ng/Hz　(3ot)
Sensor Electrode Area	0.1257 cm²（Per Electrode）
Temperature Sensor	Platinum Resitance Pt1000　Class F0.3
Operating Temperature Range	－196℃ to ＋125℃
Differential Frequency Temperature Characteristic	Within ±10 ppm +25℃ Standard (-80℃ to +80℃)
External Dimensions	Φ35.0x23.3(H)mm（Excluding Protrusions）
Weight	≦100g
Heater Power	≦6W
Oscillation Circuit Power	≦0.5W
Measurement Viewing Angle	20° (Harf Angle)