The Prosonic Flow B 200 has been specially developed for the biogas industry. It measures the volume flow of biogas, landfill or digester gas with high accuracy, even under greatly fluctuating operating conditions. In addition the Prosonic Flow B 200 offers in-situ methane content measurement. This unique feature enables continuous measurement of not only gas flow but also gas quality.

Measurement - Equipment & Instruments

Product features

Measuring Principle Ultrasonic flow
Product headline The device for accurate, reliable biogas measurement with loop‐powered technology. Integrated real‐t
Sensor features Optimized for low pressure gas – specialised sensor design. No additional pressure loss – full bore
Transmitter features Convenient device wiring – separate connection compartment. Safe operation – no need to open the dev
Nominal diameter range Single‐path version: DN 50 (2"), DN 80 (3"); Two‐path version: DN 100 to 200 (4 to 8")
Wetted materials Sensor: 1.4404/1.4435 (316L); Transducer: HNBR; Temperature sensor (option): AFM 34
Measured variables Volume flow, corrected volume flow, corrected methane volume flow, energy flow, methane fraction, ca
Max. measured error Volume flow (standard):; ‐ ±1.5 % o.r. for 3 to 30 m/s (9.84 to 98.4 ft/s); ‐ ±3 % o.r. for 1 to 3 m
Measuring range Standard: 1 to 30 m/s (3.28 to 98.4 ft/s); Option: 0.3 to 30 m/s (0.98 to 98.4 ft/s)
Max. process pressure 11 bar a (159 psi a)


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