VortexFlowSensor VA40 ZG8 Ex-d Vortex probe VA for flow measurement of gases with integrated, configurable transducer UVA in Ex-d housing Drawin g 8 Design
probe guide piece SF Measurable variables  actual flow velocity v [m/s]  actual flow rate [m
p lewithflan g e g uide p ieceSFB Other gases or gas mixtures on request. Medium Measuring range
3



primarily single-phase gas mixtures with air, nitrogen, oxygen, methane, natural gas, ammonia, argon, carbon monoxide, superheated steam ... as dominant components, biogas.   conversion to standard velocity/standard volume flow by entering working pressure and temperature parameters 0.5 ... 40 m/s /h] in
Probe, as an example, with screw thread probe guide piece SFB ProbeVA40 ZG8 as an exam Advantages  compact measuring instrument with optional on-site display in Ex-application Examples of application



flow measurement in Ex- application, for example, of air, outgoing air, sludge activation air, engine intake air, natural gas, exhaust gas, process gas, biogas, motor car exhaust, torch gas, water va Functional principle  vortex meter for measuring flow velocity, flow rate and volume   application in category 1 (zones 0and 20), transducer housing approved for category 2 (zones 1and 21) no external isolation/supply unit necessary  minimal reaction time (0.5 m/s)  ultrasonic measuring of the vortex shedding  high measuring dynamics (1:80)  steady long-term measuring p ou r  no moving parts  easy to clean Particles, humidty and condensation  high fatigue strength  corrosion resistant  charges in the gas caused by particles such as dust and fibres do not affect measurement, as long as abrasion and agglomeration do not occur on the sensor  operates to a large extent irrespective of gas composition
Kármán vortex street



relative gas humidity of less than 100 % and slight condensation on the sensor do not affect the measurement uncertaint



minor pressure drop  insertion probe with probe guide



easy configuration via HART
 -interface p ieceand Ex-dhousin g y U346_VAZG8Exd_DoP_e_070319 http://www.hoentzsch.com 1 / 8