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GMI Oxygas 500
  • GMI Oxygas 500
  • GMI Oxygas 500
  • GMI Oxygas 500
  • GMI Oxygas 500

GMI Oxygas 500

GMI Approved distributor

lead time Lead Time Approx. 14-28 Days.

Includes: Field Carrying Case, Shoulder Harness, 4mm Hex Driver, LR20 Batteries x 4 (if applicable), Clear Sample Line 1.5m, Plastic Probe 35cm Solid End, Probe Handle c/w Filters, Sample Line Adaptor, Cotton Particulate Filters (Box of 10) x 2, GMI Oxygas 500 User Handbook.

GMI Oxygas Options

The Oxygas 500 is a two button instrument designed to measure Lower Explosive Level, Volume flammable gas and Oxygen for (CGI) leak detection and purge operations.The instrument is designed to the latest standards and is certified for use in Hazardous Areas.

The  Oxygas  500  contains  the  following  ranges:

LEL, 0 to 100%
Volume gas, 0 to 100%
Oxygen, 0 to 25%.

The Oxygas 500 compliments the Gascoseeker 500 with a similar performance, measuring % LEL and % volume flammable hydrocarbons, but with the addition of oxygen for either gas/air or gas/nitrogen/air purging. The Oxygas 500 has the following additional features; automated zero during start-up, manually selectable purge mode.

The Oxygas P-500 variant has an additional part per million (ppm) range of methane.

The Oxygas 500 is easy to use with very simple training, as the operation of the instrument follows the operation of the purge cycle. The rugged design allows the Oxygas 500 to be used in harsh environments. The instrument is also fully compatible with our range of calibration software and equipment. It uses a catalytic sensor to measure LEL, which requires air to be present, and a thermal conductivity sensor to measure the % Volume range.


The opening of a pipeline or vessel causes a mixing of flammable products, such as gas with air, creatingpotentially flammable mixtures. It may not be possible to ensure that all sources of ignition are removed, hence there is a need to avoid the formation of flammable mixtures.


Combustible Gas Indicator (CGI) and Purge modes.
Simple 2-button operation, allowing user access to all features.
Audible and Visual Geiger (Ticker) in PPM range (Oxygas P-500 only).
Integral pump.
Optional Alkaline Cells or Rechargeable Battery Pack.
Proven track record for reliability.
Rugged carbon loaded polypropylene case, sealed to IP54 rating and suitable for outdoor use.
LCD with backlighting which displays the current gas readings (in both digital and analogue format).
Comprehensive range of accessories.
ATEX approved.
Directly interfaces with the GMI Auto Test Calibration Units.

GMI Oxygas 500 Specifications
Measuring Ranges 0 to 25% Oxygen (O2)
0 to 100% VOL GAS
0 to 100% LEL
0 to 1000 PPM Flammable (Oxygas P-500 only).
Resolution Oxygen (O2) 0 to 21% - 0.1%
21% to 25% - 1%.
Resolution Vol Gas 0 to 100% - 1%.
Resolution LEL 0 to 10% - 0.1%
10% to 100% - 1%.
Resolution PPM Flam. 0 to 1000 - 5 ppm.
Sampling Integral pump with flow fail sensor; sample path is protected by a hydrophobic filter and automatic pump switch-off.
Sensor Life Flammable 5 Years
Oxygen 2 Years.
Display LCD containing:
4-digit digital display
Analogue display
3-character range indication
Operational Flags.
Temperature -20ºC to +50ºC (-4ºF to +122ºF).
Humidity 0-95% R.H. non-condensing.
Battery 4 ‘D’ size Alkaline Cells or Rechargeable Battery Pack.
Battery Life 5 hours Alkaline or 9 hours Rechargeable at 20oC (68oF).
Rating IP54 (Dust protected and splashproof).
Geiger (Ticker) Indicates gas concentration increase in PPM range via the increased rate of sounder and LED pulse (Oxygas P-500 only).
Certification ATEX II 2 G EEx ia d IIC T4 (Ta = -20oC to +50oC)
IECEx Ex ia d IIC T4 Gb (Ta = -20oC to +50oC)
UL 913 Class I, Div 1 Groups A, B, C and D.
Construction Moulded polypropylene case.
Dimensions 180 x 95 x 105 mm (7.1 x 3.7 x 4.1 in).
Weight 1.7kg / 3.75lbs.
Oxygas 500 warranty Two-years.


GMI Oxygas 500 Datasheet

PDF Specifications of the GMI Oxygas 500 Combustible Gas Indicator (CGI).

Download (1.83M)

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GMI Oxygas 500
Charger Standard Charger c/w Universal Power Supply. 13184
Lead 12V car charger lead. 12988
240V Charger + s/w Smart Charger & Datalogging Software c/w 240V Power Supply (UK Plug). 13100
220V Charger + s/w Smart Charger & Datalogging Software c/w 220V Power Supply (Euro Plug). 13440
110V Charger + s/w Smart Charger & Datalogging Software c/w 110V Power Supply (USA Plug). 13340
FlexiCal Plus FlexiCal Plus. 99556
35cm Probe Plastic Probe - 35 cm Open End. 13427
80cm Probe Plastic Probe - 80 cm Solid End. 12393
ACCESSORIES (Oxygas P-500 only)
Handle Probe handle. 13561
Handle Adaptor Probe Handle Adaptor Assembly (use with 13561). 13562
Dust Filter Assembly In-line Dust Filter Assembly (use with 13561). 42184
Water Filter Assembly In-line Water Filter Assembly (use with 13561). 42183
Cup Probe Bellows Cup Probe (use with 13561). 13563
Swan Neck Probe Swan Neck Probe c/w Shroud (use with 13561). 12393

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