Nihon Dempa Kogyo Co.,Ltd., NDK, and Japan Aerospace Exploration Agency, JAXA, have developed an original QCM sensor system named “Twin-QCM” for ground use since 2015, putted on the market in 2017. Twin-QCM series has “Twin-CQCM(Cryogenic QCM)” with built-in heater and “Twin-TQCM(Thermoelectric QCM)” with built-in peltier element. Key feature of Twin-QCM technology is forming two electrodes, reference and detection, on one quartz crystal (hence the name is “Twin”-QCM), to enables stable measurement by cancelling temperature dependence of the output frequency. In addition, by mounting an RTD (Resistance Temperature Detector) Pt1000 on the same quartz crystal and directly measuring the temperature of the crystal, highly accurate temperature control and measurement is possible.
Since 2021, we have proceeded to initiate the development of advanced “Cryo-use Twin-TQCM”　with wide temperature range down to 40K, aiming for flight and exploration. In this presentation, we will report the comparison test result between conventional CQCM and advanced Cryo-use TQCM at liquid nitrogen temperature and status of development and evaluation toward in-orbit demonstration planed in 2025.