General Description

The NT-CO Cell is a new electrochemical gas sensor with 3 electrodes for the detection of carbon monoxide (CO) in a variety of gas detection applications. Exhibiting high performance with long-term stability, the NT-CO includes a built-in chemical filter for the removal of alcohol and other interfering gases. This compact (20.4mm dia) sensor is designed to comply with European performance standards for use in garages, tunnels and car parks, and is also suitable for more arduous applications such as mining.

NT-CO Specifications

Detectable gas:                        Carbon monoxide

Detection range:                            0 – 1000 ppm

Maximum overload:                             2000 ppm

Output current:                        75 +/- 15 nA/ppm

Reproducibility:                                       +/- 2%

Output drift in air:                       less than 5 ppm

Response time (90%):                   < 30 seconds

Temp. depend. in air:                <10ppm (0-40°C)

Expected lifetime*:                  More than 2 years

 

Operating conditions

Operating temperature:            -20 +50 degrees C

Humidity range:                              15 – 90% RH

Pressure:                                       0.9 – 1.1 atm

Recommended resistor:                         10 ohms

Bias voltage:                                    Not required

 * Time taken for sensitivity to drop to less than 40% of original output.

Characterisation File (PDF)

Nemoto's porous electrode technology enables accurate gas detection with high sensitivity. The mechanical design of the sensor gives optimum gas diffusion characteristics, and the hermetically sealed enclosure prevents costly electrolyte leakage.

The integral gas filter is made with absorbing materials that effectively remove cross-sensitive gases and vapours such as alcohols, hydrogen Sulphide nitrogen dioxide, and sulphur dioxide. The filter results in the excellent gas selectivity of the NT-CO.