Description
Acrolein LEL detector – flameproof sensor transmitter – ATEX, SIL 2, Zone 1, 2
online, continuous detection and monitoring of LEL and flammable level of acrolein gas / 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
Model: S2XX7
Acrolein is a clear, colorless, or yellow liquid with a pungent, suffocating odor. It is very flammable and may polymerize violently. Acrolein should be stored in a cool, dry, well-ventilated area in tightly sealed containers separated from alkaline materials such as caustics, ammonia, organic amines, or mineral acids, strong oxidizers, and oxygen. Acrolein is soluble in water, alcohol, ether, and acetone. The smell of burnt fat (as when cooking oil is heated to its smoke point) is caused by glycerol in the burning fat breaking down into acrolein.
Acrolein is mostly used to make acrylic acid. It is also used to control plant and algae growth in irrigation canals. Acrolein kills or controls microorganisms and bacteria in oil wells, liquid hydrocarbon fuels, cooling-water towers and water treatment ponds. In paper making, acrolein is used to control slime.
SMART S series acrolein 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 acrolein vapour or leakage in all industrial and commercial area eg. chemical plant, 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.
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.
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
Technical Specifications:
- Measuring Parameters: LEL or flammable concentration of acrolein gas (2.80% 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:
- Insecticides, pesticides
- Manufacturing plants
- Chemical plants
- Petrochemical units, polymer
- Warehouse, chemical storage
- Water treatment
