Oldham Simtronics GD1 Laser Open Path H2S Gas Detector

The GD1 has been designed with features that provide an effective response to the detection of gas hazards in a wide range of industrial environments from offshore production facilities to wastewater treatment plants.

At the heart of the detector is a tunable laser diode that eliminates environmental effects from sun, rain, sand, and fog. The laser scans single absorption lines where there is no interference from other gases.

Unlike traditional methods for detecting H2S (MOS or EC cell), the GD1 needs no recalibration and can replace multiple standard detectors to cover the same risk.

The complete optomechanical design and construction is so stable that an ultra fast response time can be achieved whilst providing unparalleled service life and detector stability, thus saving on maintenance and service costs.

The detector is supplied with worldwide hazardous area approvals, is suitable for SIL2 applications and comes with a 5 year warranty.

Features

• Fail safe
• Fast response time
• Calibration free
• Operates up to 98% of obscuration

Technical data:

General

Detection method IR-	New IR laser scanning
Source	Tunable laser diode Laser Class 1, eye safe
Detected gas	H2S
Range	0-200 ppm*m 0-500 ppm*m 0-1000 ppm*m 0-2000 ppm*m 0-5000 ppm*m 0-20000 ppm*m
Path length	5 – 75 m
Self test	Continuous
Calibration	Factory set, no field recalibration

Performance:

Accuracy	<±4% of full range
Repeatability	<±4% of full range
Response time	<5 sec

Optics:

Alignment	±0.30 Degree
Optics	Heated (transmitter and receiver)
Tolerable obscuration	98% (Allowable signal loss)

Output signal:

Standard	4-20mA source or sink HART®
Fault signals	Fault 1 mA Beam block 2 mA Warning 3 mA (optional)

Electrical:

Power supply	24V DC, range (18 – 32V DC)
Power consumption	<15 W
Cable entry	M25

Temperature range:

Storage	-55°C to +65°c (-67°f to + 149°f)
Operating	-55°C TO + 65°C (-67°F TO +149°F)
Atex flameproof	-55°C to + 75°c (-67°f to +167°f)
Humidity (operation)	100% RH

Material:

Tx and rx housing	Stainless steel (ASTM 316)
Junction box	Grp

Weight:

Approx.	5.5 Kg (12 lbs) per tx or rx
Approx.	2.0 Kg (4.4 Lbs) per tx or rx junction box

Dimensions:

Tx and rx housing

Ref. Outline drawing

Warranty:

5 Years full warranty on detector system

Approvals:

Atex rating tx/rx	II 2 g Ex d [op is] IIC T6/T5 Gb
Atex rating jb	II 2 g Ex e IIC T5 Gb
Iecex	Ingress
Sil	Suitable for use in SIL2 systems

Accessories:

GD1-X00-TT01	Alignment kit
GD1-X00-TT02	Test cell

Product Data Sheet