top of page


Residential Nitrogen Dioxide (NO2) Sensor



Detectable Gas:

Detection range:

Maximum overload:

Output current:


Long Term Sensitivity drift:

Response time (90%):

Temp. depend. in air:

Expected lifetime:

Nitrogen Dioxide (NO2)

0 – 30 ppm

150 ppm

150 +/- 30 nA/ppm

+/- 2%

less than 4% /month

< 25 seconds

< 2 ppm (-20 to 50°C)

2 years

Operating Conditions

Operating temperature:

Humidity range:


Recommended resistor:

Bias voltage:

-20 +50 degrees C

15 – 90% RH

0.9 – 1.1 atm

10 ohms

Not required

General Description:

The NAP-550 is a new electrochemical gas sensor with 3 electrodes for the detection of Nitrogen Dioxide (NO2) in a variety commercial gas detection applications. Exhibiting high performance with long term stability, this compact sensor is suitable for portable or disposable Gas Detection Instruments or Fixed Gas Detection heads alike. The NAP-550 is a version of the popular NE4-NO2, designed to be mechanically compatible with the NAP-505 CO sensor. The two sensors working together represent unbeatable value, especially in the field of underground car park monitoring.

Nemoto's porous electrode technology enables accurate gas detection with high sensitivity. The mechanical design of the sensor gives optimum gas diffusion characteristics, and the hermetically sealed enclosure prevents costly electrolyte leakage.

  •        3-Electrode design for greater stability

  •        Compact, leak proof enclosure

  •        Resistant to shocks and vibration

  •        Terminals may be soldered

  •        Linear output

  •        Highly specific to target gas

  •        Unaffected by humidity

  •        Low Power consumption

  •        Very Low Long term drift

bottom of page