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Technology : Products : Toxic Gas Detection : Ammonia Detection

Ammonia Gas Laser Detection

Significant operational cost saving - no consumable sensing elements

Overview

This Open Path Gas Detector (OPGD) is specific to Ammonia (NH3). The separate transmitter and receiver assemblies are certified for use in potentially explosive atmospheres and can detect NH3 over distances of 5 to 120 meters. Constructed in high grade corrosion resistant 316 Stainless Steel this device is ideally suited for onshore, offshore, open and enclosed environments. With no consumable parts and the patented daily auto-self testing facility called ‘SimugasTM’, the Senscient ELDSTM NH3 detector offers significant installed and operational cost savings over conventional  fixed point toxic gas detectors.

Features

  • Fastest speed of response (<3 seconds) ­ Increased safety by providing earlier warning.
  • Operates up to 120 meters ­ Significant installation cost savings over multiple fixed point gas detectors.
  • No consumable parts ­ No on-going cost for replacement sensing elements and associated service labour.
  • SimuGasTM daily auto gas testing ­ No manual intervention or on-going cost for routine gas testing.
  • NH3 specific ­ No false alarms from interference gases as experienced with many fixed point toxic gas detectors.
  • BluetoothTM connectivity ­ No physical intervention required for local interrogation, event log downloading and trouble shooting.

Applications

Open path NH3 gas detectors are used to monitor for fugitive emissions, protect personnel and warn of plant failure. 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. compressors, pump sets, pressure reducers, valves and pipe flanges.

Typical applications include:

  • Petrochemical refineries
  • Chemical plants
  • Power generation plants
  • Fertilizer plants
  • Metals manufacturing and processing plants
  • Food and beverage processing plants

Specifications:

Gas
Ranges

Path Length
Format

Ammonia (NH3)
0-1000 ppm.m
0-5000 ppm.m
5-40 m or 40-120 m
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,
NH3
e.g. 0-1000 ppm.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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