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

General Description:

The NE4-CL2 is an electrochemical gas sensor with 3 electrodes for the detection of Chlorine (Cl2) 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 mechanical design of the sensor gives optimum gas diffusion characteristics, and the hermetically sealed enclosure prevents costly electrolyte leakage.


Note: The signal output of the NE4-CL2 sensor is of opposite polarity to other sensors such as those for carbon monoxide

NE4-CL2 Electrochemical Chlorine (Cl2) Gas Sensor


Detectable gas:

Chlorine (Cl2)

Detection range:

0 – 10 ppm

Maximum overload:

50 ppm

Output current:

600 +/- 150 nA/ppm


+/- 2%

Zero offset in clean air:

<+/- 0.2ppm equivalent

Output drift in air:

less than 2% / month

Response time (90%):

< 40 seconds

Temp. depend. in air:

<0.5ppm (-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:

33 ohms

Bias voltage:

Not required