Petrol Vapour Detector – Flameproof, Zone 1, ATEX, SIL 2 online sensor transmitter

Petrol Vapour detector monitors LEL concentration of petrol fumes in ambient air or in gas ducts /stream. It is flameproof or explosion-proof sensor transmitter with ATEX and safety integrity level SIL 2 certified for hazardous area Zone 1, 2 installation. It is ideal for installation in commercial and industrial applications like hydrocarbon industries, petrochemical, pharma, chemical plants, solvent & adhesive plants, warehouse, paint booth and so on.

It is available with LCD Display, on-board relay contacts, flashing alarm LEDs, auto diagnostic watch dog, non-intrusive calibration, with industry standard linear analog output.


Petrol Vapour Detector – explosion proof, fume LEL sensor transmitter – ATEX, SIL 2, Zone 1, 2

online, continuous detection and monitoring of LEL (flammability) of petrol vapour in air or gas stream ducts, flameproof / explosion proof certified Zone 1, 2 – ATEX, SIL 2, with / without display, contact relays, flashing alarm LEDs, RS485 serial interface with Modbus RTU protocol

atex-explosion-imageModel: S2XX7

Petrol Vapour is highly flammable or explosive gas / fuel. With small energy / spark, it can create explosion, damaging millions and millions of assets and human life. Besides, being explosion, petrol vapour or fumes can be toxic to biological life causing:

  • difficulty breathing.
  • throat pain or burning.
  • burning in the esophagus.
  • abdominal pain.
  • vision loss.

Petrol Vapour Detector or fume sensor transmitter or detector is high accuracy, reliable, performance oriented, robust, industrial grade, flameproof or explosion proof instrument for LEL concentration detection. The instrument can be installed for flammability level or LEL detection of petrol vapour concentration or leakage in all industrial and commercial area eg. oil & gas refinery, petrochemical plants, fuel bunker, petrol stockyard, oil tankers etc.

The detector can be installed at walls, surfaces or in ducts for monitoring in gas or air sample. It is ATEX EEx’d’ 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 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 unique feature of auto diagnostic watch dog with zero point tracking feature. Due to its 10-bit microprocessor based control unit, it offer high accuracy over long term. The detector is also equipped with sintered filter with flashback arrestor for enhanced safety.

Petrol Vapour detector - flameproof, ATEX, Zone 1 online, sensor transmitter
Petrol Vapour detector – flameproof, ATEX, Zone 1 online, sensor transmitter

Key Features:

  • Catalytic bead based Pellistor sensor cell with low flash energy
  • 10-bit microprocessor control unit
  • Non-intrusive one-man calibration via hall effect switches
  • ATEX certified explosion proof / flameproof, suitable for Zone 1, 2 gas explosion installation
  • Linear, proportional analog industry standard current output
  • Continuous system self-diagnosis with watch dog
  • Flashback arrestor with sintered filter
  • Auto Zero point tracking to zero point compensation
  • SIL 2 HW TUV certified
  • RS485 serial interface with Modbus RTU communication (optional)
  • 1 or 3 relay output module (optional)
  • System and alarm LED indicators (optional)
  • Modbus RTU communication over RS485 serial interface


Petrol vapour detector - gasoline LEL monitor, flameproof, ATEX, Zone 1
Petrol vapour detector – gasoline LEL monitor, flameproof, ATEX, Zone 1

Technical Specifications:

    • Measuring Parameters: LEL or flammable concentration of Petrol vapour / fumes
    • Sensor Technology: Catalytic bead based pellistor sensor cell
    • Measuring range: 0 ~ 100 % LEL
    • Response time (t90): < 30 sec
    • Control unit: 10 bit microprocessor based
    • Warm up time: < 5 mins
    • Auto zero point tracking for drift compensation
    • Power supply: 24V DC
    • Ingress protection: IP65
    • Enclosure: Stainless steel (for sensor cell), anti-static epoxy coated metal alloy (for transmitter)
    • Output: linear, proportional 4-20mA
  • Mounting: wall, duct, pipeline
  • Safety integrity level: SIL 2
  • ATEX marking:
    • CE 722 Ex II 2G EEx d IIC T6
    • CE 722 Ex II 3G EEx nA IIC T6
  • Optional: LCD Display, alarm LEDs, potential free relay contacts
  • Hazardous area: Zone 1, 2


  • Petrol filling station
  • Gasoline pumps
  • Petroleum warehouse, bunkers
  • Refinery, crude oil pipelines
  • Transport Stations
  • Fuel stations