PNG Gas Leak Detector

Your Security from unwanted gas leakage detection is our responsibility

PNG Gas Leak Detector

PNG (Methane), chemically known as CH4 is highly flammable, lightweight gas with LEL at 5% Vol = 100% LEL.

Methane gas detector series is highly robust, industrial grade, flameproof or explosion proof gas detector for methane leakage detection or LEL monitoring. Methane is also available in form as a natural gas, pressurized natural gas (PNG), liquefied natural gas (LNG).



The detector is used for online, continuous monitoring of the flammable concentration of methane in %LEL or %Vol terms in ambient air or in duct or pipeline. It is ATEX, IECEX, PESO certified with SIL 2 safety integrity level for hazardous area installation Zone 1 and 2.


The sensor transmitter offers linear, proportional analog output in industry standard current signals, over measuring a range of 0 ~ 100 % LEL (lower explosive limit). The detector works on highly sensitive catalytic bead-based pellistor sensor cell, with low response time. It has the unique feature of an auto diagnostic watchdog with zero point tracking feature. Due to its 12-bit microprocessor based control unit, it offers high accuracy over the long term. The detector is also equipped with a sintered filter with flashback arrestor for enhanced safety.

It also offers optional features like inbuilt LCD display, flashing alarm LEDs, onboard potential free relay contacts (24VDC @ 1 A), RS485 serial interface with Modbus RTU communication.


Technical Specifications:

  • Measuring Parameters: LEL level or leakage detection – methane, LNG, PNG, natural gas
  • Sensor Technology: Catalytic bead-based pellistor sensor cell
  • Measuring range: 0 ~ 100 % LEL ( 0 ~ 5% vol)
  • Response time (t90): < 10 sec
  • Control unit: 12-bit microprocessor based
  • Auto zero point tracking for drift compensation
  • Power supply: 24 VDC
  • Ingress protection: IP65, IP 66, IP68
  • Enclosure: Stainless steel (for sensor cell), anti-static epoxy coated metal alloy (for transmitter), polycarbonate
  • Output: linear, proportional 4-20mA
  • Mounting: wall, duct, pipeline
  • Safety integrity level: SIL 2
  • Optional: LCD Display, alarm LEDs, potential free relay contacts
  • Hazardous area: Zone 1, 2
  • Commercial areas: Kitchen, store room, pine line


  • Coal mines, underground mines
  • Oil & gas, refinery
  • Fertilizer industry
  • PNG/city gas distribution system
  • PNG / LNG automobile gas filling stations
  • Landfill Gases
  • Sewage treatment plants (STP), effluent treatment facility
  • Cryogenic application
  • Chemical, petrochemical industry
  • Food processing industry
  • Furnace, burner application
  • Gas reticulation system

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