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

NAP-505 Electrochemical Carbon Monoxide Gas Sensor

General Description:

The NAP-505 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.

Conforming with all relevant performance standards, including component listing to UL 2075, the NAP-505 represents outstanding performance/price benefits over other designs.



Detectable gas:

Carbon Monoxide (CO)

Detection range:

0 – 1000 ppm

Maximum overload:

1500 ppm

Output current:

40 +/- 15 nA/ppm


+/- 2%

Output drift in air:

less than 5 ppm

Response time (90%):

< 30 seconds

Temp. depend. in air:

<10ppm (0-40°C)

Expected lifetime:

 7 years

Operating conditions

Operating temperature:

 -20 +50 degrees C

Humidity range:

15 – 90% RH


0.9 – 1.1 atm

Recommended resistor:

10 ohms

Bias voltage:

Not required