CH-A3 Methane Sensor

CH4 Gas Sensor, Catalytic Pellistor, A-Series, 0 – 100% LEL methane

Certified pellistor for LEL methane detection in harsh industrial environments

The CH-A3 is an A-Series catalytic pellistor designed for flammable gas detection with a primary calibration to methane. It delivers fast response to 0 – 100% LEL methane with robust performance in certified flameproof housings. Typical applications include confined space entry, landfill gas, mining, wastewater treatment plants, oil and gas operations and power generation. Its sensitivity profile to a wide range of hydrocarbons supports versatile LEL monitoring in multi-gas safety instruments. 
  Request Quote   Buy Online   View Datasheet

Key Specifications:

 

Sensor Model

Target Gas

Technology / Package

Concentration Range

Typical Sensitivity

T90 Response Time

Operating Life

CH-A3

Methane (CH4), calibrated for 0 – 100% LEL (also responds to other hydrocarbons)

Catalytic pellistor, A-Series

0 – 100% LEL methane

15 – 22 mV per % CH4

< 15 s (typically < 7 s) from air to 50% LEL

> 24 months until 75% of original sensitivity (24-month warranted)

 

Feature

Benefit

Certified flameproof pellistor design

Suitable for use in Ex d housings for hazardous area gas detection.

Fast T90 (< 15 s, typically < 7 s)

Enables rapid alarm response for worker safety in dynamic gas environments.

Wide hydrocarbon response table

Supports detection of a broad range of flammable gases, referenced to methane sensitivity.

A-Series form factor

Simplifies integration into portable 4-gas and multi-gas instruments alongside Alphasense toxic sensors.