Low-Cost Electrochemical Toxic Gas Sensors for Residential and Light Commercial Applications

NAP-508 Electrochemical Carbon Monoxide Gas Sensor

General Description:

The all-new NAP-508 Gas Sensor is a 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.

Drawing from Nemoto’s considerable experience with the established and very popular NAP-505 sensor, the NAP-508 represents the next generation of low-cost CO sensors from Nemoto, benefiting from a warranted 10 year life when used in a residential or light commercial environment



Detectable gas:

Carbon Monoxide (CO)

Detection range:

0 – 1000 ppm

Maximum overload:

10,000 ppm

Output current:

20 +/- 5 nA/ppm


+/- 2%

Long Term zero drift:

less than 5 ppm

Response time (90%):

< 30 seconds

Temp. depend. in air:

<15ppm (-20 to +50°C)

Expected lifetime:

 10 years

Operating conditions

Operating temperature:

 -20 to +50 degrees C

Humidity range:

15 – 90% RH


0.9 – 1.1 atm

Recommended resistor:

10 ohms

Bias voltage:

Not required

Component Approved to UL2034 / UL2075

Warranted 10 Year Lifetime!