Gas Data GM25-5 Gas Analyser

Serviced by Flux Purchase

Portable Landfill & Ground Gas Analyser

The Gas Data GM25-5 is a compact portable gas analyser designed for routine ground gas monitoring and environmental site investigation.

Its fixed five-gas configuration measures methane (CH₄), carbon dioxide (CO₂), oxygen (O₂), hydrogen sulphide (H₂S) and carbon monoxide (CO). Atmospheric and static pressure measurements are also incorporated, providing the core parameters required for routine monitoring of ground gas conditions.

The GM25-5 also features hydrogen-compensated CO measurement, helping improve carbon monoxide measurements where hydrogen may otherwise interfere with the electrochemical sensor.

With no differential-pressure or internal flow measurement, the GM25-5 provides a straightforward option where the primary requirement is gas concentration and borehole pressure monitoring.

Key Features

  • Five gas channels: CH₄, CO₂, O₂, H₂S and CO

  • Hydrogen-compensated CO measurement

  • Atmospheric pressure measurement

  • Static pressure measurement

  • Compact handheld design

  • ATEX, IECEx and UKEx rated

  • Internal data logging

  • DataField GM25 Connect compatibility

  • Optional gas velocity and temperature measurement

  • 8–12 hour battery life

  • User-replaceable battery pack

  • 12-month service interval

Application guidance: Choose the GM25-5 for routine ground gas monitoring, contaminated land and site investigation where gas concentrations and pressure are required but integrated flow measurement is not necessary. Gas Data specifically identifies site investigation as an application.

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