High Range Industrial Hydrogen Sulphide (H2S) Sensor

General Description:

The NE4-H2S-500 is an electrochemical gas sensor with 3 electrodes for the detection of Hydrogen Sulphide (H2S) in a variety of industrial process control 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.

Similar to the popular NE4-H2S-100 sensor, the NE4-H2S-500 has an extended detection range or 500ppm, enabling it to be used in process control applications such as Biogas plants or analysis of landfill gas.



Detectable Gas:

Detection range:

Maximum overload:

Output current:

Zero Offset (20°C)


Output drift

Response time (90%):

Temp. depend. in air:

Expected lifetime:


0 – 500 ppm

2,000 ppm

200+/- 50nA/ppm

<+/- 2 ppm equivalent

+/- 2%

less than 10%/Year

< 30 seconds

<3ppm (-20 to +50°C)

>2 years

Operating Conditions:

Operating temperature:

Humidity range:


Recommended resistor:

Bias voltage:

-20 +50 degrees C

15 – 90% RH

0.9 – 1.1 atm

10 ohms

Not required


  •        3-Electrode design for greater stability
  •        Compact, leak-proof enclosure
  •        Resistant to shocks and vibration
  •        Linear output
  •        Highly specific to target gas
  •        Unaffected by humidity
  •        Low Power consumption
  •        Very Low Long term drift