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// DEVICE

AT-GAS/B/CH4 - Methane Concentration Sensor

The AT‑GAS/B/CH4 is an intrinsically safe device for continuous monitoring of methane concentration.

ATUT Gas Detection System – AT-GAS/B/CH4 Methane Concentration Sensor

// DESCRIPTION

What it is

The AT‑GAS/B/CH4 is designed for demanding industrial conditions, including hazardous areas with potentially explosive atmospheres. The terminal compartment is fitted with terminals and a cable gland for easy connection of power and signal lines to host systems, controllers, and other devices with a compatible data interface. 

Its enclosure houses the electronics and a built‑in measuring transducer that delivers precise measurement and converts the measured value into a digital signal transmitted over an RS485 interface. 

The device is part of the AT‑GAS measurement and visualization system, which consists of the AT‑GAS/A and the AT‑GAS/B/CH4.

// Features

Features

01

Measurements

  • Methane (CH4) measurement across the full 0–100% range
  • Measurement accuracy per EN 60079‑29‑1: ±3% CH4 or ±5% of reading (Group I), ±5% of range or ±10% of reading (Group II)
  • Part of the AT‑GAS measurement and visualization system (works with the AT‑GAS/A)
02

Design and Data Transmission

  • Intrinsically safe Ex ia design - Group I (M1) and Group II (2G)
  • IP65‑rated enclosure
  • Operating range: -20°C to +40°C, humidity up to 95%
  • RS485 digital output - direct integration with controllers and host systems
// Application

Applications

01

  • Hazardous areas with explosive gas atmospheres
  • Process gas monitoring
  • Safety and environmental monitoring systems
  • Industrial installations requiring continuous atmosphere monitoring
// Parameters

Technical data

Ex marking of the AT-GAS/B/CH4 measuring head
I M1 Ex ia I Ma, II 2G Ex ia (CH4) Gb
Supply voltage
10 to 15V DC
Current draw at 15 V supply
< 50mA
Measuring range
0 - 100%
Measurement accuracy
±3% CH4 or ±5% of reading (Group I), ±5% of range or ±10% of reading (Group II), (per EN 60079-29-1)
Operating temperature
-20⁰C to +40 ⁰C
Relative humidity
<95%
Mechanical hazard
low
Degree of protection
IP65
Dimensions (W × H × D)
178 x 148 x 100 mm
Weight
< 2kg
// Documents

Downloads

// Gallery

Photos

// Classification
Version
  • Iskrobezpieczeństwo (Ex i)
  • ATEX
  • Ex