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Vane wheel flow sensor ZS25 ZG5 Ex-d Drawin Vane wheel probe ZS25 for flow measurement of gases and liquids with integrated, configurable transducer UFA in Ex-d housing g 5
Vane wheel flow probe ZS25 (Dimensions see Page 3)  compact design with optional on-site display in Ex-application  application in category 1 (zones 0 and 20), transducer housing approved for Category 2 (zones 1 and 21) Measurable variables Design  no external isolation/supply unit necessary  actual flow velocity v [m/s] in air/gases  insertion probe with Ex-d housing  (actual) flow rate [m³/h] in air/gases and water/ liquids  conversion to standard velocity/standard volume flow by entering working pressure and temperature parameters Examples of application

Vane Wheel Sensor ZS25 Ex-d - U383 - 7174 

flow measurement e.g. of air, exhaust gas, process gas



in processes with varying and/or unknown gas com- positions



flow monitoring in pharma- ceutical installations Measuring range  0.4 ... 120 m/s



monitoring inertisation processes Humidity in the sample gas



measurement of flammable liquids  relative gas humidity of less than 100 % has no impact on the measurement uncertainty Medium Functional principle  vane wheel flow sensor



measuring in non-conducting liquids such as ultra pure water, for example in the semiconductor industry  sensing the vane rotation; non-contact by means of inductive proximity switch Particles in the medium Advantages  can cause restriction in the fatigue strength of the vane wheel set



air, gas mixtures and clean gases  accurate measured values even in varying and/or unknown gas compositions



water, liquids with viscosities of u p to200 cSt _ ZS25 Exd_DoP_e _ 0810201 http://www.hoentzsch.comU383 / 8