Ammonia gas LEL detector – analog sensor transmitter, flameproof, ATEX, Zone 1, 2

Ammonia gas detector Smart S series, monitoring LEL concentration of ammonia gas in ambient air or in ducts. It flameproof or explosion proof sensor transmitter with ATEX and safety integrity level SIL 2 certified for hazardous area Zone 1, 2. It is ideal for installation in ammonia cracker, fertilizer unit, chemical plants, refinery, manufacturing units and so on

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

Description

Ammonia LEL detector – flameproof sensor transmitter – ATEX, SIL 2, Zone 1, 2

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

SMART S series ammonia sensor is highly robust, industrial grade, flameproof or explosion proof instrument for LEL concentration detection. The instrument can be installed for ammonia LEL detection in all industrial and commercial area eg. ammonia cracking plant, fertilizer, chemical plants, ammonia compressor 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 offer high accuracy over long term. The detector is also equipped with sintered filter with flashback arrestor for enhanced safety.

Ammonia LEL sensor transmitter - online monitor, explosion proof Zone 1, SIL 2, display & alarm relays
Ammonia LEL sensor transmitter – online monitor, explosion proof Zone 1, SIL 2, display & alarm relays

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.

 

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

 

Ammonia LEL detector - flameproof ATEX for Zone 1, 2, pellistor sensor, IP65, display
Ammonia LEL detector – flameproof ATEX for Zone 1, 2, pellistor sensor, IP65, display

Technical Specifications:

  • Measuring Parameters: LEL or flammable concentration of ammonia gas
  • Sensor Technology: Catalytic bead based pellistor sensor cell
  • Measuring range: 0 ~ 100 % LEL ( 0 ~ 15% v/v @ STP)
  • 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: 24 VDC
  • 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:

  • Fertilizer & chemical industry
  • Oil & gas, refinery
  • Ammonia compressor, chillers
  • Cold stores, warehouse
  • Refrigeration systems
  • Degreasing agent, bleaching chemicals
  • Explosive manufacturing
  • Ammonia cracking unit