September 2, 2009
Murata Manufacturing Co., Ltd.
President/ Statutory Representative Director: Tsuneo Murata
Murata Manufacturing Co., Ltd has developed a highly sensitive “catalytic combustion type gas sensor” operable under low temperature conditions. Conventional catalytic combustion type gas sensors generally use platinum coils for sensing temperature. Murata has improved the sensitivity of the sensor by replacing platinum coils with a thermistor having superior temperature coefficient of resistance. Furthermore, while the catalyst is heated at more than 300℃ for conventional catalytic combustion type gas sensors, Murata’s sensor can operate at a low temperature of 100℃ using a thermistor device. A gas detection test conducted using hydrogen showed Murata’s sensor can operate at a high output and fast response of 1.5V and 1sec respectively, contributing to lower power consumption (0.24W) in addition to the low operating temperature.
The detection methods used for currently popular gas sensors include semiconductor, catalytic combustion, and solid electrolytic types. The catalytic combustion type, in particular, is used to detect combustible gasses such as methane and propane. Also, as the recent concerns for environmental issues and energy issues mount, development of gas sensors capable of detecting atmosphere polluting gasses and volatile organic chemicals, in addition to hydrogen and ethanol used as raw materials for fuel cell production, came into focus. It is projected that “catalytic combustion type gas sensors” will be in much demand. Since hydrogen, ethanol, carbon monoxide, etc. are combustible and may be detected by a catalytic combustion type detection method they will be readily used in the energy, environment and safety management fields.
Detection of combustible gasses
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