This menu shows a selection of the equipment you can buy from BaSystemen. Would you rather look through it together, or would you like some advice? Our people will be more than happy to help you.
This menu shows a selection of the equipment you can rent from BaSystemen. Would you rather look through it together, or would you like some advice? Our people will be more than happy to help you.
The GM25 series from Gas Data is a range of advanced, portable gas analysers designed specifically for a variety of environmental applications. From landfill gas management and biogas plants to environmental compliance and confined space safety. The GM25 series is available in various configurations, which are described below.
Gas Data is a leading manufacturer in the field of gas analysis and biogas monitoring.
The GM25 models are equipped to measure various gases, such as methane (CH₄), carbon dioxide (CO₂), oxygen (O₂), hydrogen sulphide (H₂S), carbon monoxide (CO) and volatile organic compounds (VOCs). Specific models, such as the GM25-5, feature advanced hydrogen-compensated CO detection for maximum accuracy. All models in the GM25 series work seamlessly with the DataField GM25 Connect app, allowing users to view, analyse and store real-time data on their mobile device or tablet. The readings can of course also simply be read from the large LCD screen.
The GM25 models are compact and robust in design and easy to handle, ideal for use in the field. Thanks to ATEX and IECEx certification, these instruments are safe to use in potentially explosive environments. From the GM25-1 with 2 gas measuring channels to the GM25-4 and GM25-5 with 5 to 6 gas measuring channels, there is a model available for every specific application. Please note that each model has a fixed configuration, so sensors cannot be added to a GM25 instrument afterwards.
1. Landfill gas management & environmental monitoring
The GM25-3 and GM25-4 are specifically designed for measuring landfill gas and environmentally relevant emissions. Accurate measurement of methane, CO₂ and other harmful gases enables operators to ensure environmental compliance and reduce emissions.
2. Confined space safety
The GM25-1 is ideal for safety checks in confined spaces such as sewers, storage tanks and industrial installations. This model detects elevated CO₂ levels and low O₂ values, so that employees can be warned of dangerous conditions in good time.
3. Biogas & industry
For biogas production and industrial applications, the GM25-2 offers a flexible configuration with up to 6 gas measuring channels, including pressure and flow measurements. This helps operators to optimise processes and maximise gas yields.
GM25-1 – Compact CO₂ and O₂ analyser for air quality measurements in confined spaces.
GM25-2 – Configurable gas analyser for industrial and biogas applications with up to 6 gas channels.
GM25-3 – Fixed configuration with 5 measuring channels for landfill gas monitoring and environmental supervision.
GM25-4 – Advanced 6-channel gas analyser for land contamination and compliance monitoring.
GM25-5 – High-end 5-channel gas analyser with hydrogen-compensated CO detection, ideal for environmental measurements and borehole monitoring.
Wondering which GM25 analyser best suits your application? Contact us for more information or request a quote straight away.
Integrated rechargeable battery, 8 hours
GM25-1
| Sensor | Range | Resolution | Uncertainty |
| CO2 | 0 - 10.000 ppm | 10 ppm | ± 500 ppm |
| O2 (Optional) | 0 - 25% | 0,1% | ± 0,5% |
GM25-2
| Choose 1: | CH4 | CO2 | ||
| Choose up to 4: | O2 | H2S | H2 | CO |
| Choose up to 2: | Atmospheric pressure | Static pressure | ||
| Choose 1: | Differential |
GM25-3
| Sensor | Range | Resolution | Uncertainty |
| CH4 | 0 - 100% | 0,1% | ± 3% |
| CO2 | 0 - 100% | 0,1% | ± 3% |
| O2 | 0 - 25% | 0,1% | ± 1% |
| H2S | 0 - 5000 ppm | 1 ppm | ± 50 ppm |
| CO | 0 - 2000 ppm | 10 ppm | ± 100 ppm |
| LEL | 0 - 100% | 0,1% | ± 3% |
| Atmospheric pressure | 800 to 1200 mB | 1 mB | ± 2 mB |
| Static pressure | ± 100 mB | 1 mB | ± 5 mB |
| Differential | ± 30 mB | 0,01 mB | ± 0,5 mB |
| Optional: Flow | 0,30 Nm3/hour | 0,1 m3/hour | ± 5% |
GM25-4
| Sensor | Range | Resolution | Uncertainty |
| CH4 | 0-100% | 0,1% | ± 3% |
| CO2 | 0-100% | 0,1% | ± 3% |
| O2 | 0-25% | 0,1% | ± 1% |
| H2S | 0 - 5000 ppm | 1 ppm | ± 50 ppm |
| CO | 0 - 2000 ppm | 10 ppm | ± 100 ppm |
| Hexane | 0 - 2% | 0,1% | ± 2% |
| LEL | 0 - 100% | 0,1% | ± 3% |
| Atmospheric pressure | 800 to 1200 mB | 1 mB | ± 2 mB |
| Differential | ± 1250 Pa | 1 Pa | ± 3 to ± 250 Pa |
| Flow | -60 - 100L/hour | 0,1 L/hour | ± 3 L/hour |
GM25-5
| Sensor | Range | Resolution | Uncertainty |
| CH4 | 0-100% | 0,1% | ± 3% |
| CO2 | 0-100% | 0,1% | ± 3% |
| O2 | 0-25% | 0,1% | ± 1% |
| H2S | 0 - 10.000 ppm | 1 ppm | ± 5% |
| CO | 0 - 2000 ppm | 10 ppm | ± 5% |
| LEL | 0 - 100% | 0,1% | ± 3% |
| Balance | 0 - 100% | 0,1% | ± 5% |
| Atmospheric pressure | 800 to 1200 mB | 1 mB | ± 2 mB |
| Static pressure | ± 100 mB | 1 mB | ± 5 mB |
| Flow | -60 - 100L/hour | 0,1 L/hour | ± 3 L/hour |
Optional for all models
| Sensor | Range | Resolution | Uncertainty |
| Air velocity | 0,7 to 40 m/s | 0,1 m/s | ± 0,5 m/s |
| Temperature | -10 to 100 ºC | 0,5 ºC | ± 1 ºC |
Wide range
Enjoyment, safety and health
Helpful
Rental, sales and maintenance
Tell us what you are looking for and we will help you on your way.
Contact
BaSystemen BV
Protonstraat 13G
9743 AL Groningen, The Netherlands
+31505712124
info@basystemen.nl
Opening hours
Monday 08:00–17:30
Tuesday 08:00–17:30
Wednesday 08:00–17:30
Thursday 08:00–17:30
Friday 08:00–17:30
Saturday Closed
Sunday Closed
In urgent cases we are also reachable outside opening hours on +31 (0)50-5712124
Copyright 2026 BaSystemen B.V.