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Citizen Develops the World's First Hydrogen
Sensor with Coiled Coil Construction
Citizen Watch Co., Ltd. has developed a catalytic-combustion-type
hydrogen sensor that can be used to monitor fuel cells and detect
hydrogen leaks. The new product is the world's first hydrogen sensor
having a coiled coil (double helix) structure. In the heat coils of
conventional gas sensors, a single spring structure is used. Citizen
has adopted a coiled coil construction in which a double-helix
spring structure is employed for the heat coil.
With this unique structure, the new product has a greater
resistance to vibration and impact than conventional products.
Moreover, it has a service life of 10 years, double that of the
conventional products, and its response time (the time needed to
detect a hydrogen leak) is about two or three seconds, which is half
or even less that of its predecessors. In addition, the adoption of
an all-ceramic casing for the sensor has approximately doubled the
heat resistance compared with older products, which use plastics for
casing.
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© 2005 Webcom
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