In our new film, Tory introduces the BioBasic Bionix, our online gas analyzer for biomethane. In just under two minutes you will see what it measures at a grid injection plant and how it performed in a six-day field comparison with a process gas chromatograph.
Key points from the film
- One reading every second for CH₄, CO₂, O₂ and H₂S, continuously and right at the injection point.
- Highly accurate in the field: across six days and more than 500,000 one-second readings, the methane values differed from the process gas chromatograph by less than 0.3 % by volume on average.
- Changes seen sooner: in the field comparison, the BioBasic Bionix showed changes about eleven minutes sooner on average, so you can adjust your upgrading plant that much earlier.
- Touch display operation: one tile per gas with its trend, data logging to a USB stick, and soon the GasAnalyzer Connect app.
- Considerably less expensive than a gas chromatograph.
Make sure your biomethane is on spec before grid injection
Biomethane composition keeps changing, even after upgrading. The process gas chromatograph provides the values used for custody transfer, but it works in cycles of several minutes and cannot see what happens between two analyses.
The BioBasic Bionix measures continuously and shows a change as soon as the gas reaches the analyzer. It complements the GC used for custody transfer: the chromatograph remains the reference for billing, while the BioBasic Bionix gives you a reading every second to run the process.
Measured against the benchmark: the field comparison
We installed the BioBasic Bionix right next to a process gas chromatograph at a biomethane grid injection plant in Germany. Both instruments ran side by side for six days in July 2026, after the calibration parameters had been adjusted.
| Gas | Mean deviation from the process gas chromatograph |
|---|---|
| CH₄ | < 0.3 vol.% |
| CO₂ | ≈ 0.1 vol.% |
| O₂ | ≈ 0.01 vol.% |
The figures are based on more than 500,000 one-second readings. The test gas itself has an uncertainty of ±0.2 vol.% for CH₄. H₂S was not part of the comparison. The time lead of about eleven minutes depends on the GC cycle and the sample line. You will find the charts from the field comparison on the BioBasic Bionix campaign page.
Measuring ranges, display and interfaces
- CH₄: 90–100 vol.%, NDIR
- CO₂: 0–10 vol.%, NDIR
- O₂: 0–30 vol.%, electrochemical
- H₂S: 0–100 ppm, NDUV
On the colour touch display, each gas has its own tile with the current value and its trend. You can write the measurement data to a USB stick, and the GasAnalyzer Connect app is coming soon to Google Play and the App Store. As standard, the analyzer has a 4–20 mA output and an RS232 interface; Profibus DP, Profinet, Ethernet IP and Modbus TCP are available as options.
Presented by Tory
Tory is the AI assistant of Fresenius Instruments. In the film she appears as an AI avatar; her image and voice are generated. On our website, Tory answers your questions about your measuring task in the chat and puts you in touch with our team when you need it.
Learn more about the BioBasic Bionix
Technical data, studio photos and a 3D view are on the BioBasic Bionix product page. For the requirements that apply to grid injection, read our article Biomethane feed-in into the natural gas grid. Planning a new measuring point? Get in touch.
