Prosonic Flow B 200: No compromise on biogas flow measurement

Stable operation of a biogas plant relies on the continuous monitoring of several process parameters.Fermentation temperature, gas pressure and, most importantly, the quantity of gas produced all need to be monitored around the clock in order to ensure an optimised process. Precise measurement of biogas flow rate is crucial as this provides vital information on the health of an anaerobic digester and the efficiency of the process. To date, due to the difficult application conditions including dirt and moisture alongside low pressure, no flowmeter system has been able to provide a reliable, repeatable and accurate flow measurement, with thermal mass flow measurement being recognised as the best compromise. Now, however, Endress+Hauser has introduced the Prosonic Flow B 200 ultrasonic flowmeter specifically for this application. For the first time it is possible to accurately measure the volume of biogas, landfill gas or fermentation gas, with the added benefit of being able to measure the methane content of that flow. Unbeatable ultrasonic flow measurement Ultrasonic flow measurement offers biogas plant operators many advantages compared to traditional measurement methods. Thanks to modern, innovative sensor technology, wet and dirty gases can now be measured with high accuracy even under greatly fluctuating process conditions. The measurement is independent of the gas composition or moisture content and is possible at very low gas pressures - a benefit that no other flowmeter has achieved to date. The Prosonic Flow B 200 is an industry-optimised flowmeter that exhibits high measuring accuracy (±1.5%) and a wide operable flow range (30:1). It causes no pressure loss and requires no maintenance once installed. The Prosonic Flow B 200 is available in diameters between DN 50 (2") and DN 200 (8") and can be used at gas temperatures of up to +80°C and gas pressures up to 10 bar, but more importantly, down to 0.9 bar absolute. As an intrinsically safe two-wire measuring device (Ex ia), the Prosonic Flow B 200 is especially suited for use in hazardous areas. Menu-guided local operation allows the user to optimally configure measuring points according to their requirements. Methane content measurement directly in the pipe Digester or fermentation processes are not always uniform. The operating conditions will fluctuate leading to different methane content in the biogas. Ideally, this should be constantly monitored. Prosonic Flow B 200 makes it possible to measure the methane content of a gas as the flow measurement is made, thanks to an ultra-precise sound velocity measurement and integrated temperature sensor. This feature provides early indications of work required to maintain ideal process conditions, together with information for optimum efficiency control of a downstream CHP system. As a multivariable flowmeter, Prosonic Flow B 200 can also calculate additional values upon request, including corrected volume, heating output or Wobbe index, giving a performance indicator for fuel gas quality.

For more information on Prosonic Flow B 200: No compromise on biogas flow measurement talk to Endress+Hauser Ltd