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Catalytic Type Gas Sensor - NAP-57A

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• Good stability
• Excellent repeatability and detection accuracy
• Good linearity against gas concentration at wide range
• Quite excellent poisoning resistivity
• Down sizing for design flexibility of gas alarm or detector

Model Number: NAP-57A
Data Sheet:

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Product Specification

NAP-57A Catalytic Type Gas Sensor Description
NAP-57A is a newly developed catalytic type gas sensor based on conventional type NAP-56A for not only residential but also commercial or semi-industrial applications because of having highly excellent poisoning resistivity. Since its power consumption and pin positions are completely the same as NAP-55A and 56A, it is easily replaceable as it is. However, it does not possess the explosion proof by itself, then it is recommended to install it into an explosion proof chamber for actual application.

NAP-57A Catalytic Type Gas Sensor Features
• Good stability
• Excellent repeatability and detection accuracy
• Good linearity against gas concentration at wide range
• Quite excellent poisoning resistivity
• Down sizing for design flexibility of gas alarm or detector

NAP-57A Catalytic Type Gas Sensor Usage
• Gas alarm or detector of general combustible gases for all applications
• Gas densitometer
• Driving module for gas leakage detector

NAP-57A Catalytic Type Gas Sensor Maximum ratings

Supply voltage to sensor	AC 3.3V (50 － 60Hz) DC 3.3V
Ambient temperature and humidity in operation Temperature Humidity	-40 ～ +80℃ less than 99%RH (without dew condensation)
Ambient temperature and humidity in storage Temperature Humidity	-40 ～ +80℃ less than 99%RH (without dew condensation)

NAP-57A Catalytic Type Gas Sensor Ratings

Supply voltage to sensor	AC 2.5 ± 0.25V(50－60Hz) DC 2.5 ± 0.25V
Current(when 2.5V is supplied)	AC 160 ～ 180mA(50－60Hz) DC 160 ～ 180mA
Ambient temperature and humidity in operation Temperature Humidity	-20 ～ +60℃ less than 95%RH (without dew condensation)
Ambient temperature and humidity in storage Temperature Humidity	-30 ～ +70℃ less than 99%RH (without dew condensation)

NAP-57A Catalytic Type Gas Sensor Detection range
It can measure/detect whole combustible gases less than 100%LEL, however the excellent accuracy of linearity within +/-10% can be obtained less than 50%LEL.

NAP-57A Catalytic Type Gas Sensor Response and recovery time