Detection, Protection, Innovation

Gasurveyor 500 Series

Package includes:

  • Gasurveyor 500 Series Instrument
  • G500 Carry Case (13405)
  • 4mm Hex Driver (12451)
  • User Handbook (42129)
  • 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)
  • Shipping List (42639)
  • LR20 Alkaline Battery x 4 (10278) *Dry Cell Instruments Only*
Ask a Question »

Full Name (required)

Email (required)

Phone Number (optional)

Company Name (required)

Country (required)

State / Province (required)

County (England & Wales Only)

Your Question (required)

Gas Detection Needed (required)

How did you find out about us? (required)

Please enter the characters below to verify you're human:


The Gasurveyor 500 Series is the most flexible range of gas detectors available from GMI. By simple selection of hardware and software options, the instrument can be readily configured to suit your exact application. Offering highly accurate and reliable instrumentation in an extremely robust, anti-static case, the Gasurveyor 500 Series measures gases common in many applications.

Any combination of flammable gas from parts per million (ppm) through Lower Explosive Limit (LEL) to percent volume, oxygen, carbon monoxide and hydrogen sulphide can be selected to ensure that your exact requirements are met. All of the Gasurveyor 500 Series are dual mode instruments, making them suitable for both surveying work and confined space.

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

Key Features

  • Range of 4 button and 2 button instruments
  • ATEX  Certified
  • Auto range LEL/Vol %
  • 4 Button Series Dual mode with Datalogging
  • Up to 4 gases
  • Robust durable case
  • Auto calibration available


  • Confined space monitoring
  • Permit to work systems
  • Pressurised tunnelling
  • Petroleum installations
  • Fleet auxiliary
  • Carbon Monoxide monitoring
  • Toxic gas detection

Technical Specification

Measuring Ranges

CO 0 – 1000ppm
H2S 0 – 100ppm
LEL 0 – 10%
LEL 10 – 100%
O2 0 – 25%
VOL 0 – 100%


Ex Certified UL_Logo_50x50CSA (US and Canada) Certified CE Certified

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


Highly visible flashing LED Sounder:  In excess of 80 dBA.  Typically 85 dBA @ 1m

Physical Properties

180 (H) x 95 (W) x 105 (D) mm
7.1 (H) x 3.7 (W) x 4.1 (D) in

1.7 kg (3.75 lbs)


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

4 ‘D’ size alkaline cells or rechargeable battery pack


High impact rubberized polycarbonate case

IP Rating

Back to Top