Detection, Protection, Innovation

Oxygas 500

Package includes:

  • Oxygas 500 Instrument (42501X or 42501XR) OR Oxygas P500 (42501P or 42501PR)
  • G500 Carry Case (13405)
  • 4mm Hex Driver (12451)
  • 30mm Harness Assembly (12370/2)
  • 1.5M Tygon Tubing (12712)
  • 35cm Solid End Probe (12480)
  • Probe Handle Assembly c/w Filters (12481)
  • Cotton Filters – 2 Boxes of 10 (10077)
  • Sample Line Adaptor (12688)
  • User Handbook (42621)
  • Shipping List (42646)
  • LR20 Alkaline Battery x 4 (10278) *Dry Cell Instruments Only*
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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 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.

For more info, call our sales team on +44 (0)141 302 8302.

Key Features

  • Simple 2-button operation
  • Automatic hydrocarbon range selection
  • Gas/Air and Gas/Nitrogen/ Air purge mode
  • Can be calibrated via an IR link to GMI auto test


  • Leak detection
  • Bar hole survey
  • Gas/air or gas/nitrogen/air purging
  • Gas escape detection
  • Hot work permitting
  • Leak source detection (ppm variant)

Technical Specification

Measuring Ranges

LEL 0 – 10%
LEL 10 – 100%
O2 0 – 21%
O2 21 – 25%
PPM 0 – 1000ppm
VOL 0 – 100%


Ex Certified UL_Logo_50x50CE Certified

IEC Ex ia d IIC T4 Gb
ATEX Ex II 2G Eex ia d IIC T4
UL913 Class 1 Div 1 Groups ABCD

Physical Properties

180 (H) x 95 (W) x 105 (D) mm
7.1 (H) x 3.7 (W) x 4.1 (D) in
1.2kg (2.5 lbs) with alkaline batteries


0 – 95% RH non-condensing

-20oC to + 50oC (-4oF to + 122oF)

Sampling System

Integral pump with flow fail sensor
Sample path protected by hydrophobic filter and auto pump switch off

Power Supply

Approx. 15 hours’ runtime
Rechargeable (NiCd):
Approx. 9 hours’ runtime

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