Gas Data GM25-3

The Gas Data GM25-3 is engineered specifically for landfill gas extraction, perimeter monitoring and waste-to-energy projects. A fixed five-channel configuration provides analysis of key landfill gas components with nitrogen calculated by difference, giving a clear view of gas quality and system behaviour in a single test. Measurement ranges and resolution are aligned to typical landfill gas compositions, enabling fine adjustment of extraction settings and supporting consistent environmental and regulatory reporting.

The analyser combines infrared and electrochemical sensors to deliver fast, accurate readings across the configured gas channels. High resolution supports small changes in gas concentration to be identified, which is critical when balancing wells or assessing changes in feed gas to waste-to-energy plant. Defined accuracy specifications for each gas underpin confidence in results during compliance checks, optimisation exercises and long-term trend analysis.

In addition to gas composition, the GM25-3 measures atmospheric, static (gauge) and differential pressure to provide a comprehensive view of landfill gas collection performance. Flow is calculated from differential pressure and presented in normal cubic metres per hour (Nm³/hr), directly supporting engineering calculations and comparison between wells or manifolds. This combined gas, pressure and flow capability allows detailed extraction tuning, well balancing and troubleshooting of underperforming lines without carrying multiple instruments.

With a weight of around 1 kg and a compact form factor, the GM25-3 is easy to handle on active landfill cells, perimeter routes and energy compounds. A high-contrast LCD supports clear viewing in bright sunlight and low-light conditions, while ingress protection up to IP65 (model-dependent), a robust ABS housing and protective carry cases provide resilience against dust, moisture and mechanical knocks. An internal pump supplies a representative sample at a controlled flow rate, helping maintain measurement stability across varying site conditions.

ATEX, IECEx and UKEx certifications, together with an intrinsic safety explosion rating, qualify the GM25-3 for use in risk-assessed hazardous locations such as Zone 1 landfill and gas extraction areas. This allows portable gas analysis, system diagnostics and perimeter checks to be carried out in areas classified due to the presence of flammable landfill gas, while maintaining compliance with relevant safety requirements.

A user-swappable battery pack typically provides approximately 8–12 hours of operation, with a recharge time of around four hours. Battery packs can be exchanged in the field to minimise downtime during intensive campaigns, and chargers are supplied to match the mains standard of the deployment country. This approach supports extended survey work and multi-site visits without interrupting monitoring schedules.

Onboard data logging enables measurements to be stored directly on the instrument, creating traceable records for audits, performance reviews and regulatory submissions. Logged data is transferred via USB in CSV format for straightforward use in common analysis and reporting tools. Compatibility with Instrument Connect / SiteMan software supports structured sample point management and reporting, while integration with the DataField GM25 Connect app allows remote control from mobile devices or tablets. When internet connectivity is available, real-time remote access and live data streaming to a web-based portal provide earlier visibility of site conditions, enabling faster response to changing gas behaviour.

The GM25-3 allows measurement and logging parameters to be configured to match specific site procedures, from routine perimeter checks through to detailed extraction tuning programmes. Hierarchical naming and structured label storage help organise data by site, field, well and sampling point, reducing the likelihood of mislabelled readings and simplifying long-term performance tracking across multiple locations.

An accessory ecosystem extends the analyser beyond core gas, pressure and flow measurement. An optional vane anemometer enables direct measurement of gas velocity, while an optional brass probe allows gas temperature to be recorded under typical landfill conditions. Together with supplied items such as a USB data cable, sample pipe, charger, small spares kit and tools, these options support complete site assessments using a single, integrated platform.

The Gas Data GM25-3 is supported by an annual service and recalibration regime designed to maintain measurement accuracy and uphold certification validity. A 12-month service interval is clearly indicated both on the calibration certificate and the instrument home screen, assisting with compliance planning. Typical service includes full calibration and part replacement within a usual turnaround of 10–15 working days, with rental or hire units commonly available to maintain monitoring continuity. The analyser itself is available for purchase or on rental/hire, supporting both long-term operational programmes and short-term projects. Consumables and spares are easily sourced via authorised distributors or directly from the manufacturer, and technical support, training and demonstrations are typically provided to help site teams operate the instrument confidently.