Residential Carbon Monoxide (CO) Sensor

Warranted 10 YEAR LIFETIME

General Description:

The NAP-508 Gas Sensor is a new low–cost 3-electrode electrochemical gas sensor designed for the detection and measurement of carbon monoxide in the range 0-1000ppm, in domestic carbon monoxide detectors, fire detectors, air quality monitors and commercial gas detection applications such as Underground Car Parks.

Warranted for 10 years continuous operation, and conforming with all relevant performance standards, including component listing to UL 2075, the NAP-508 represents outstanding performance/price benefits over other designs.

The NAP-508 may be soldered directly to a pcb, and each sensor is also labelled with a QR code giving its calibration data, meaning the finished instrument may be calibrated electronically without the need to expose the detector to test gas - an important production cost saving for high volume CO detector manufacturers



Detectable Gas:

Detection range:

Maximum overload:

Output current:


Output drift in air:

Response time (90%):

Temp. depend. in air:

Expected lifetime:

Carbon Monoxide (CO)

0 – 1000 ppm

2000 ppm

20 +/- 5 nA/ppm

+/- 2%

less than 3%/year

< 30 seconds

<10ppm (-20 to-50°C)

12 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


  •        10 Year Warranted Lifetime
  •        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