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

NE7-CO Electrochemical Carbon Monoxide Gas Sensor

General Description:

The NE7-CO is an electrochemical gas sensor with 3 electrodes for the detection of Carbon Monoxide (CO) in the range 0-1000ppm. The sensor is the first “7-series” sensor manufactured by Nemoto.

Designed for general purpose use within fixed toxic gas Detection heads in industrial safety applications, the sensor may also be used for a wide range of other applications where reliable and accurate detection of CO levels in air is required.



Detectable gas:

Carbon Monoxide (CO)

Detection range:

0 – 1,000 ppm

Maximum overload:

2,000 ppm

Output current:

100 +/- 25 nA/ppm


+/- 1%

Zero offset in clean air:

<+/- 5ppm Equivalent

Output drift in air:

less than 5% signal /year

Response time (90%):

< 30 seconds

Temp. depend. in air:

<10ppm (-20 to+50°C)

Expected lifetime:

 >3 years in normal service

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