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

NE4-CO-SI Lower Cost Electrochemical Carbon Monoxide Gas Sensor

General Description:

The NE4-CO-SI is a low cost electrochemical gas sensor with 3 electrodes for the detection of Carbon monoxide (CO) in a variety of industrial and commercial gas detection applications. Exhibiting high performance with long-term stability, this compact (20.4mm dia) sensor is suitable for portable Gas Detection Instruments or Fixed Gas Detection heads.  Nemoto's porous electrode technology enables accurate gas detection with high sensitivity. The NE4-CO-SI has been developed as a lower cost alternative to the NE4-CO sensor for use in cost sensitive applications such as underground Car-Park monitoring systems.



Detectable gas:

Carbon Monoxide (CO)

Detection range:

0 – 1000 ppm

Maximum overload:

1500 ppm

Output current:

50+/- 10 nA/ppm


+/- 2%

Zero offset in clean air:

<+/- 5ppm Equivalent

Output drift in air:

less than 5%/year

Response time (90%):

< 30 seconds

Temp. depend. in air:

<10ppm (-20 to+50°C)

Expected lifetime:


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