Measuring technology for flow rate, mass flow rate and flow velocity
Derived from the Kármán phenomenon of vortex shedding, this principle of measurement is based on vortices forming around a bluff body in the sensor head. Their shedding frequency is detected with the help of an ultrasonic field, thus allowing for precise measurement of flow velocity and flow rate, from just 0.5 m/s, of air/gases.
Flow rate measurements are to a large extent unaffected by changes in pressure, temperature, kinematic viscosity and gas composition. The great advantages of ultrasonic scanning of the flow velocity are the very low initial value of just 0.5 m/s and the wide measuring range!
Vortex meters have high long-term stability, no moving parts and are resistant to aggressive gases. They still deliver exact results even when the flow is particle-laden or condensate forms. This means that vortex flowmeters are highly suited for biogas measurement or flow rate measurement in exhaust emissions.
The range of applications for Höntzsch vortex flow meters is manifold. For example, the ex-protected (ATEX, CSA) vortex sensor is ideally suited for flow rate measurement in biogas, sewage gas and landfill gas. Through the process-related, partially low gas onset, the lowest flow velocities can be measured with our vortex meters, making them an excellent choice for biogas measurement. Furthermore, the gas composition or changes in the gas, as well as wet or particle-laden gas, have no effect on the measuring results. The optimized design of the flow sensor causes a negligible pressure loss when measuring volume flow, so that even critical processes and applications as well as normative guidelines can be adhered to. These features distinguish us from other providers of conventional vortex flowmetes..
Some further application examples:
Flow rate and flow velocity measuring in wet and/or particle-laden gases, such as biogas or waste gas or exhaust air; for government agencies according to Clean Air Guidelines (TA Luft); flow rate measurement of sludge aeration air, sewage gas, landfill gas and water vapour; engine intake air and mass flow measurements on test benches; flow measuring in climatic wind tunnels, in traffic tunnels, in nuclear reactor technology, CVS systems, etc. Vortex meters are also the perfect choice for applications in the cement industry.
Designs and features of vortex flow meters: