Biomethane analyzer BioBasic

monitoringprocessfor quality control

The BioBasic Biomethane is a biomethane analyzer that monitors product gas quality after biogas upgrading, directly at the grid injection point. It measures CH4, CO2, O2 and H2S every second, so operators see a deviation while it develops and can readjust the upgrading unit before off-spec gas reaches the grid.
Typical applications:

• Biomethane grid injection and renewable natural gas (RNG) plants
• Gas network transfer stations: fast process-side complement to the custody-transfer process gas chromatograph, which delivers a reading only every few minutes
• Biogas upgrading by amine scrubbing, pressure swing adsorption or membranes
• Power-to-gas and SNG

What operators get:

• A reading every second instead of minutes between GC cycles
• Wear-free optical measurement: NDIR dual-beam for CH4 and CO2, NDUV with reference detector for H2S
• Automatic, self-monitored calibration with zero and test gas at an adjustable interval
• No sample conditioning for dry biomethane; optional pump-free version driven by line pressure from 60 mbar
• 4–20 mA as standard; Profibus DP, Profinet, EtherNet/IP and Modbus TCP as options; UL/CSA Listed as an option
• ATEX-certified flame arrester at the sample gas inlet; the analyzer itself is designed for installation outside hazardous areas, ideally in an air-conditioned indoor room

Technical data (excerpt):

• Measuring ranges: CH4 90–100 vol.%, CO2 0–10 vol.%, O2 0–30 vol.%, H2S 0–100 ppm
• Expanded uncertainty (% of full scale): CH4 0.2, CO2 0.5, O2 0.3, H2S 0.5
• Measurement interval: 1 s
• NDIR and NDUV cells temperature-stabilized at 45 °C
• Calibration: automatic, approx. 4 min per cycle
• Housing: wall-mounted, IP54, 400 × 600 × 220 mm, 18 kg

Full specifications: data sheet (as of 11.08.2026) under Catalogs.