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Technology : Products : Flammable Gas Detection : Ethylene Detection

Ethylene Gas Laser Detection

Highest reliability - No false alarms from other hydrocarbons

Overview

This Open Path Gas Detector (OPGD) is specific to Ethylene (C2H4). The separate transmitter and receiver assemblies are certified for use in potentially explosive atmospheres and can detect C2H4 over distances of 5 to 200 meters. Constructed in high grade corrosion resistant 316 Stainless Steel this device is ideally suited for onshore, open and enclosed environments. With no consumable parts and the patented daily auto-self testing facility called ‘SimugasTM’, the Senscient ELDSTM C2H4 detector offers significant installed and operational cost savings over conventional fixed point flammable gas detectors.

Features

  • Fastest speed of response (<3 seconds) ­ Increased safety by providing earlier warning.
  • Operates up to 200 meters ­ Significant installation cost savings over multiple fixed point gas detectors.
  • Specifically selected, low water value absorption wavelength ­ Ensures the best uptime availability in heavy fog and rain of any open path device.
  • SimuGasTM daily auto gas testing ­ No manual intervention or on-going cost for routine gas testing.
  • C2H4 specific ­ No false alarms from interference gases as experienced with many fixed point flammable gas detectors.
  • BluetoothTM connectivity ­ No physical intervention required for local interrogation, event log downloading and trouble shooting.

Applications

Open path C2H4 gas detectors are used to monitor for fugitive emissions and protect plant from the risk of an explosion. These devices are typically located to provide a detection barrier around the perimeter of a plant, process or storage area; or positioned in close proximity to specific items of plant, that pose a real risk of gas escape: e.g. pump sets, pressure reducers, valves and pipe flanges.

Typical applications include:

  • Petrochemical refineries
  • Chemical plants
  • Plastics manufacturing plants

Specifications:

Gas
Ranges

Path Length

Format

Ethylene (C2H4)
0-10,000 ppm.m*
0-1 LEL.m
* 5-40 m & 40-120 m options only
5-40 m or 40-120 m or 120-200m
Individual Transmitter (Tx) & Receiver (Rx)

Performance:

Response Time
Repeatability
Linearity

T90 =< 3 seconds
< ± 5% FSD
< ± 5% FSD

Environmental:

Ingress Protection
Enclosure Material
Lens Material Tx
Lens Material Rx
Operating Temperature
Humidity
Vibration
EMC

IP66/67 NEMA type 4/4X/6
316L stainless steel
Faceted Optical Glass
Aspheric Optical Glass
-55°C to +60°C (ambient)
0 -­ 100% RH (non-condensing)
10 ­- 150 Hz, 2 g
EN50270

Certification/Approvals:

CSA and UL
Class I Div 1 Groups B C & D T5
Class II Div 1 Groups E F & G T5
Class III Div 1
Ex d IIB + H2 T5
Class I, Zone 1, AEx d IIB + H2 T5
Tamb = -40°C to +60°C
Entry: ¾” NPT 

ATEX and IECEx:
II 2 GD
Ex d IIB + H2 T5
Tamb -40°C to +60°C Gb
Ex tb IIIC  T100oC
Tamb -40°C to +60°C Db 
IP66/67
Entry: M25

GOST-K 
EAC Ex TR CU Coc
1ExdIIBT5/H2 X
Entry: M25 

GOST-R
EAC Ex TR CU Coc
1ExdIIBT5/H2 X
Entry: M25 

InMetro
Ex d llB + H2 T5 Gb
Ex tb IIIC T100 °C  Db IP66/67
Tamb: -20 °C a +60 °C
Entry: M25

 

Safety Integrity

Suitable for use in SIL2 Safety Systems per IEC 61508

Electrical:

Operating Voltage
Power Consumption
Outputs (Analog x 2)






Low Signal
Beam Block
Inhibit
Fault
Output (Digital)

Tx & Rx +24V DC , (+18 to +32V DC)
Tx = 12 W (max), Rx = 10 W (max)
4-20 mA,
Configurable for 2 wire isolated or single wire, sink or source.
Primary range on 4-20mA(1)
Secondary range on 4-20mA(2),
Note: Secondary range is typically greater than the primary.
3 mA (configurable 1 to 4 mA)
2.5 mA (configurable 0 to 3.5 mA)
2 mA (configurable 1 to 3.5 mA)
0.5 mA (configurable 0 to 1 mA)
HART 7.1 & MODBUS RTU supported

Mechanical:

Size
Weight
Sun / Deluge Protection

Mounting

Tx/Rx 140 mm dia. x 300 mm
Tx/Rx 12 kg each (c/w bracket)
Tx & Rx supplied with sun / deluge protection
Tx & Rx supplied with mounting brackets incorporating fixing holes / slots for flat surface or metal pole mounting. (Note: mounting poles should be of 4” to 6” (100 to 150mm) diameter. Fixing bolts / U bolts are not supplied) 

Optical:

Uses HARMONIC FINGERPRINTTM to ensure no false alarms during adverse environmental conditions, misalignment or partial obscuration.

Alignment
Obscuration
Heated Optics
Laser Beam
FDA Accession Number

+/- 0.5°
<= 95%
Tx & Rx lenses are continuously heated.
Class 1 (Eye Safe) IEC 60825-1
1410373-000 (For U.S.A imports)

Calibration:

Factory calibrated for life, no routine calibration required.

Ordering Information:

To order / specify:
Gas type:
Measuring Range:
Path length:
Certification:

Senscient ELDS 1000,
C2H4
e.g. 0-1 LEL.m
e.g. 5-40m
e.g. ATEX

Accessories:

Approved Interface terminal (PC)
Interface Terminal(tablet)
Optical Alignment Scope
Gassing Cell (Optional)
Snow Cowl (Optional)

Contact Us For more information

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