BioBasic Bionix
Online gas analyzer for biomethane: one reading every second
The BioBasic Bionix delivers one reading every second for CH₄, CO₂, O₂ and H₂S. It monitors biomethane quality after upgrading and at the transfer point to the gas grid and reveals swings that fall between two values of a process gas chromatograph.
Application
The BioBasic Bionix monitors product gas quality after biogas upgrading, right at the transfer point to the gas grid. It measures CH₄, CO₂, O₂ and H₂S every second, so the upgrading plant can be adjusted quickly and injection kept within the grid specification.
The process gas chromatograph remains the instrument for custody transfer. The BioBasic Bionix complements it as a fast, process-oriented measurement. See the field comparison in charts
Features
- One reading every second, continuous
- Colour touch display with one tile per gas and trend
- Automatic calibration with span and zero gas, error-monitored
- Plug & play, faults in plain text
- Data transfer 4–20 mA and RS232, optional Profibus DP, Profinet, Ethernet IP, Modbus TCP
- Optional pumpless from 60 mbar inlet pressure
Areas
- Biomethane grid injection plants
- Gas grid transfer stations
- Biogas upgrading
- Power-to-gas and SNG
Data
| Measuring interval | One reading every second, continuous |
|---|---|
| Gas components | CH₄, CO₂, O₂, H₂S |
| Measuring ranges | CH₄ 90–100 vol.%, CO₂ 0–10 vol.%, O₂ 0–30 vol.%, H₂S 0–100 ppm |
| Measuring principle | CH₄/CO₂: NDIR, O₂: electrochemical, H₂S: NDUV with reference detector |
| Resolution | CH₄ 0.1 vol.%, CO₂ 0.01 vol.%, O₂ 0.05 vol.%, H₂S 0.1 ppm |
| Expanded uncertainty | CH₄ 0.2 %, CO₂ 0.5 %, O₂ 0.3 %, H₂S 0.5 % of full scale |
| Calibration | automatic with span and zero gas, approx. 4 min per cycle, no readings during this time |
| Sample transport | internal pump 4 l/min, optional pumpless from 60 mbar inlet pressure |
| Ambient conditions | 20–30 °C, air-conditioned indoor installation only |
| Operating voltage | 230 V AC / 50 Hz, alternatively 115 V AC / 60 Hz or 230 V / 60 Hz |
| Housing | Wall-mounted housing 400 × 600 × 200 mm, IP 54, 18 kg |
| Display and operation | Colour touch display |
| Interfaces | 4–20 mA and RS232, optional Profibus DP, Profinet, Ethernet IP, Modbus TCP |
| Safety | ATEX-certified flame arrester at the sample inlet, speed-monitored housing fan |
This table is an extract. Tolerances, response times, terminal assignments and the full list of options are in the data sheet. As of 20 October 2026. The data sheet is always the binding version. Request the data sheet →
Measurable substances
- CH₄ Methane
- CO₂ Carbon dioxide
- O₂ Oxygen
- H₂S Hydrogen sulfide
Key data
- Measuring interval
- One reading every second, continuous
- Operating voltage
- 230 V AC / 50 Hz, alternatively 115 V AC / 60 Hz or 230 V / 60 Hz
- Gas components
- CH₄, CO₂, O₂, H₂S
- Display and operation
- Colour touch display
- Ambient conditions
- 20–30 °C, air-conditioned indoor installation only
- Housing
- Wall-mounted housing 400 × 600 × 200 mm, IP 54, 18 kg
Interactive 3D view
Drag to rotate, from above and from below as well.
Advantages
One reading every second
While a process gas chromatograph delivers a value every few minutes, the BioBasic Bionix measures continuously. Quality swings become visible immediately, and you can adjust the upgrading plant.
Proven in the field
In a field comparison at a biomethane grid injection plant, the mean deviation from the process gas chromatograph was below 0.3 vol.% for CH₄, around 0.1 vol.% for CO₂ and around 0.01 vol.% for O₂. The test gas itself has an uncertainty of ±0.2 vol.% for CH₄; H₂S was not part of the comparison. The BioBasic Bionix complements the process gas chromatograph used for custody transfer.
Considerably less expensive than a gas chromatograph
The BioBasic Bionix costs considerably less than a process gas chromatograph, so one reading every second pays off even alongside the GC used for custody transfer.
CH₄, CO₂, O₂ and H₂S in one analyzer
CH₄ and CO₂ by NDIR, H₂S by NDUV with reference detector, O₂ electrochemically. Dry biomethane needs no sample conditioning, and the internal pump delivers 4 l/min.
Automatic, error-monitored calibration
Calibration runs automatically with span and zero gas at an adjustable interval. Limits for the calibration factor, zero-point standard deviation and offset monitor the result. Faults are shown in plain text.
Frequently asked questions
How accurate is the BioBasic Bionix compared with a gas chromatograph?
In a field comparison at a biomethane grid injection plant, the mean deviation from the process gas chromatograph was below 0.3 vol.% for CH₄, around 0.1 vol.% for CO₂ and around 0.01 vol.% for O₂. The test gas itself has an uncertainty of ±0.2 vol.% for CH₄. H₂S was not part of the comparison.
Does the BioBasic Bionix replace the process gas chromatograph?
No. The process gas chromatograph remains the instrument for custody transfer. The BioBasic Bionix complements it and reveals swings that fall between two GC values.
How often does the analyzer deliver a reading?
Every second, continuously. Only during automatic calibration are no readings available, for about four minutes per cycle.
How is the BioBasic Bionix calibrated?
Automatically with span and zero gas at an adjustable interval. Calibration is error-monitored.
Where can the analyzer be installed?
In air-conditioned indoor rooms at 20 to 30 °C. The wall-mounted housing has protection class IP 54. The flame arrester at the sample inlet is ATEX-certified; the analyzer itself is not approved for hazardous areas.
Which interfaces does the BioBasic Bionix have?
A galvanically isolated 4–20 mA output and an RS232 interface are standard. Profibus DP, Profinet, Ethernet IP and Modbus TCP are optional.
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