NAP-550 is a newly developed NO2 sensor for the gas alarm in the underground parking areas. Output signal of NO2 sensor is opposite side of general reductive gases, however the signal is quite linear to gas concentration.


NAP-550's Structure

Target gases and Concentration

Gases Detection Range
Nitrogen dioxide NO2  0 - 30 ppm

Gas sensitivity characteristics

Gas Concentration & Output Current
Nitrogen dioxide NO2 1.5±0.3μA/ppm NO2
Gas sensitivity characteristics


Items Ratings
Repeatability Less than ±2%
Response time T90: Within 30 sec.
Zero point drift <2ppm (-20 - +50°C)
Ambient Temperature In operation -20 - +50°C
Ambient humidity In operation 15 - 90%RH
Span drift Less than ±3%/Year
Expected lifetime 2 years