Detection, Protection, Innovation

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Key Product Features

  • ATEX Zone 1/2 certified
  • Programmable alarms 
  • Latching/non-latching relays 
  • Non-intrusive calibration
  • Hi-Viz LCD and LED indicators 

The GMI GasTrEx is a hazardous area transmitter sensor unit which, when used along with one of our extensive range of flammable, toxic or oxygen deficiency, flameproof detection heads provides continuous, robust and accurate protection to personnel and property.

  • Common electronic platform - simply fit the correct “personality” module unit
  • Detection head may be fitted locally or remote from transmitter unit
  • Uses well proven, reliable sensor technology including catalytic, electrochemical, PID and infra-red sensor types
  • Fully programmable, including alarm set points, latching or non-latching alarm relays, energised or de-energised alarm relays
  • Simple but secure non-intrusive, one-man calibration and configuration using GMI magnetic wand
  • Ingress protection IP 66
  • Available in display or non-display versions
  • Available in marine grade aluminium or stainless steel versions
  • Multiple output configuration allows easy interface to external control panel
  • Large clear backlit LCD display and high intensity LED indication
  • Integral mounting holes allows easy installation
  • Optional on board relays provide local alarms - 3 alarm and 1 fault
  • 3/4 wire operation, sink/source/isolated/passive/active
  • ATEX certified for Zone 1/2 hazardous area

 

Measuring Ranges

Sensor Type

Resolution

GMS Flammable: 0-100% LEL
GMS Flammable (pending): 0-100% LEL
GMS Carbon Dioxide (pending): 0-5% Vol.
GMS Oxygen: 0-25% Vol.
GMS Hydrogen Sulphide: 0-100 ppm
GMS Carbon Monoxide: 0-100 ppm
GMS Carbon Monoxide: 0-500 ppm
GDS Sulphur Dioxide: 0-10 ppm
GDS Nitrogen Dioxide: 0-10 ppm
GDS Hydrogen: 0-2,000 ppm
GDS Hydrogen Cyanide: 0-25 ppm
GDS Nitric Oxide: 0-100 ppm
GDS Hydrogen Chloride: 0-10 ppm
GDS Ammonia: 0-100 ppm
Ethylene Oxide: 0-25 ppm

Catalytic bead
Infra-Red 
Infra-Red
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical

1% LEL
1% LEL
0.1% Vol.
0.1% Vol.
1 ppm
1 ppm
1 ppm
0.1 ppm
0.1 ppm
1 ppm
0.1 ppm
1 ppm
0.1 ppm
1 ppm
0.1 ppm

Outputs

Environment

Linear 4-20 mA (isolated sink or source)
Over range - 22 mA
Fault/cal. mode - 3 mA 

Temperature:
-20 deg.C to +40 deg.C
-20 deg.C to +50 deg.C (pending)

Humidity:
0-90%  non-condensing

Display

Alarms

LCD Alpha numeric backlit display
Three high visibility red alarm LEDs

A1, A2, A3 and Fault
Latching/Non-Latching, >/<,
Alarm relays (optional)
24v DC @ 1 amp
Energised/De-Energised

Physical Properties

Weight (excluding detection heads):
2.01 kg (4.4 lbs) Aluminium
2.65 kg (5.8 lbs) Stainless Steel

Construction:
Copper free aluminium or stainless steel 316 option

 

Certification:
ATEX II 2G Ex d IIC T6 Gb
IECEx SIR 06.0016X (used with GDS sensors)

Protection Rating:
IP66

  • Chemical Plants
  • Pharmaceuticals
  • Water Treatment Plants
  • Steel Plants
  • Power Plants
  • Petro-Chemical Plants
  • General Industry
  • Heavy Industry
  • Refineries