Acrylonitrile gas sensor – Flameproof LEL detector, ATEX, Zone 1, 2

Acrylonitrile is highly flammable with LEL as 3.0% v/v and toxic at low doses. It undergoes explosive polymerization. Our Smart S series detector monitor LEL concentration of acrylonitrile gas in ambient air or in ducts. 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 solvent warehouse, paint booth, fertilizer unit, chemical plants, refinery, manufacturing units 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.

Description

Acrylonitrile gas LEL Monitor – flameproof sensor transmitter with ATEX, SIL 2 for hazardous Zone 1, 2

online, continuous detection and monitoring of LEL or flammable level of acrylonitrile gas or vapour in ambient air or ducts, flameproof / explosion proof certified Zone 1, 2 – ATEX, SIL 2, with / without display, contact relays, flashing alarm LEDs, RS485 serial interface
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Model: S2XX7

Acrylonitrile is a colorless, liquid, man-made chemical with a sharp, onion- or garlic-like odor. It can be dissolved in water and evaporates quickly. Acrylonitrile is used to make other chemicals such as plastics, synthetic rubber, and acrylic fibers. A mixture of acrylonitrile and carbon tetrachloride was used as a pesticide in the past; however, all pesticide uses have stopped.

Acrylonitrile is highly flammable and toxic at low doses. It undergoes explosive polymerization. The burning material releases fumes of hydrogen cyanide and oxides of nitrogen. It is classified as a Class 2B carcinogen (possibly carcinogenic) by the International Agency for Research on Cancer (IARC).

Flammable Limits: Lower (LEL): 3.0% Upper (UEL): 17%.

SMART S series acrylonitrile gas or vapour sensor transmitter is highly robust, industrial grade, flameproof or explosion proof instrument for LEL concentration detection. The instrument can be installed for flammability level or LEL detection of acrylonitrile vapour or leakage in all industrial and commercial area eg. chemical plant, plastic manufacturing, solvent manufacturing unit, polymer industry, manufacturing plants, warehouse 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.
Explosion proof or flameproof gas sensor transmitter - ATEX, Zone 1, 2 for all toxic, flammable gas, oxygen
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 offers high accuracy over long term. The detector is also equipped with sintered filter with flashback arrestor for enhanced safety.

Acrylonitrile sensor transmitter - analog LEL detector, LCD Display & relays, pellistor cell, explosion proof ATEX certified for zone 1
Acrylonitrile sensor transmitter – analog LEL detector, LCD Display & relays, pellistor cell, explosion proof ATEX certified for zone 1

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

 

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

 

Acrylonitrile gas fume detectors - LEL monitor with analog signals, Zone 1 ATEX SIL 2 certified, flameproof
Acrylonitrile gas fume detectors – LEL monitor with analog signals, Zone 1 ATEX SIL 2 certified, flameproof

Technical Specifications:

  • Measuring Parameters: LEL or flammable concentration of acrylonitrile gas (3.0% v/v)
  • 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

 

Application:

  • Plastic, ABS manufacturing
  • Chemical plants
  • Petrochemical units, polymer
  • Warehouse, chemical storage
  • Solvents