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SENKO can develop the most suitable detection and alarm equipment for the customer needs. SENKO Co., Ltd. is producing various customized gas sensor modules such as CO2 module, smell sensor module, hydrogen sensor module for fuel cell, oxygen sensor module, ozone sensor module, and etc. 4 to 20mA transmitters for electrochemical gas sensor (CO, NH3, SO2, NO2, HCHO, etc.) are also prepared. SENKO Co., Ltd. develops and produces sensor modules for other special gases at customer"s request. Generally, the gas sensor could be divided as 4 kinds such as the electric chemical type, the semi-conductor type, the optic type, the catalytic. The application of each sensor type is quite different. It is important to adopt the proper gas sensor depend on the gas type, environmental factor in the using area, sensing range, resolving ability, cost, etc. Senko Co., Ltd is trying to provide the most proper gas sensor and modules depend on customers requests, keeping lots of the technology development and Know How related with the gas sensor.