Gas Data GM25-3 Gas Analyser

Landfill Gas & Extraction System Analyser

The Gas Data GM25-3 is a portable landfill gas analyser designed for simultaneous measurement of gas composition, pressure and calculated gas flow.

The fixed configuration measures methane (CH₄), carbon dioxide (CO₂), oxygen (O₂), hydrogen sulphide (H₂S) and carbon monoxide (CO), together with atmospheric, static and differential pressure. Gas flow can be calculated from differential pressure across an orifice plate, providing flow measurements in Nm³/hr.

This makes the GM25-3 particularly suited to landfill gas extraction and control systems, where gas composition, pressure and higher extraction flow rates need to be assessed using a single field instrument.

Key Features

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

• Atmospheric pressure measurement

• Static pressure measurement

• Differential pressure measurement

• Calculated flow measurement using differential pressure

• Ideal for landfill gas extraction systems

• ATEX, IECEx and UKEx rated

• Internal data logging

• DataField GM25 Connect compatibility

• Optional gas velocity and temperature measurement

• 8–12 hour battery life

• 12-month service interval

Application guidance: Choose the GM25-3 primarily for landfill gas extraction wells and gas collection systems, particularly where flow through an extraction system needs to be calculated from differential pressure.

Gas Measurements

Pressure & Flow Measurements

The GM25-3 calculates flow from the differential pressure measured either side of an orifice plate, with flow displayed in Nm³/hr and is therefore best suited for higher flow extraction systems

Optional Measurements