The Prosonic Flow B 200 is the industry specialist for high-precision measurement of wet biogas, landfill gas, and digester gas. In an era where carbon neutrality and energy efficiency are paramount, this ultrasonic meter provides a game-changing advantage: integrated real-time methane fraction ($CH_4$) analysis. This allows operators to monitor not just the volume of gas, but its actual energy quality and caloric value in a single device.
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| Feature | Technical Data |
| Measured Variables | Volume flow, Temperature, Methane Fraction (%) |
| Measuring Range | 0.3 to 30 m/s (Exceptional low-flow sensitivity) |
| Methane Accuracy | ±2% absolute (Real-time calculation) |
| Process Pressure | 0.7 to 11 bar a (Engineered for low-pressure biogas) |
| Accuracy (Flow) | ±1.5% o.r. (Optional ±1.0% o.r. for high precision) |
| Transmitter | Loop-powered (2-wire) – Saves up to 50% on wiring costs |
| Materials | Stainless steel 1.4404/1.4435 (316L) |
Integrated Gas Analysis: Why buy a separate analyzer? The B 200 calculates methane content on-the-fly, providing an instant "Energy Value" output for better CHP (Combined Heat and Power) efficiency.
Wet & Dirty Gas Robustness: Unlike thermal dispersion or vortex meters, the B 200’s ultrasonic technology is unaffected by moisture, CO2 fluctuations, or soot buildup.
Zero Pressure Drop: The full-bore design prevents any restriction in the flow line, which is critical for low-pressure digester systems where every millibar of pressure counts.
Heartbeat Technology™: Perform ISO-compliant device verification without interrupting your process. Generate proof of accuracy reports directly from the control room.
2-Wire Simplicity: The B 200 is the world’s first loop-powered ultrasonic biogas meter, significantly reducing installation complexity and ATEX/Ex barrier requirements.
The Challenge: A large sewage treatment plant struggled to optimize their CHP engine. Because the methane concentration in their digester gas fluctuated by 15% weekly, volume-only measurement was leading to poor fuel-to-power conversion.
The Hanyu Solution: The plant installed the Prosonic Flow B 200 from
The Result: The B 200 provided simultaneous flow and methane % data directly to the PLC.
The Impact: The CHP engine now adjusts its air-to-fuel ratio dynamically based on the B 200’s real-time energy data. This resulted in a 12% increase in electricity generation and eliminated the need for weekly manual gas sampling.
Q1: How does the B 200 measure methane without a separate sensor?
A: It utilizes the relationship between the speed of sound and gas composition. By integrating a temperature sensor, the B 200's advanced algorithms calculate the methane fraction with high reliability in real-time.
Q2: Is it suitable for gas containing high levels of Hydrogen Sulfide ($H_2S$)?
A: Yes. The wetted parts are made of high-grade 316L stainless steel, specifically chosen to resist the corrosive nature of raw, untreated biogas and digester gas.
Q3: Can this be integrated with a flow computer for billing?
A: Absolutely. While the B 200 provides excellent internal data, it is often paired with the [SICK Flow-X High-Precision Flow Computer] or a dedicated PLC for formal energy balancing and reporting.
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