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Vane Wheel Sensor ZS25 Ex-d - U3830 pages
Vane wheel flow sensor
nnnnZS25 ZG5 Ex-d
nnnnhontzsch
nnnnflow measuring technology
nnnnVane wheel probe ZS25 for flow measurement of gases and liquids with integrated,
nnnnconfigurable transducer UFA in Ex-d housing
nnnn.0
nnnnDrawing 5
nnnnu
nnnn-205
nnnnVane wheel flow probe ZS25
nnnn(Dimensions see Page 3)
nnnnMeasurable variables
nnnnactual flow velocity v [m/s] in
nnnnair/gases
nnnn(actual) flow rate [m3/h]
nnnnin air/gases and water/
nnnnliquids
nnnnconversion to standard
nnnnvelocity/standard volume flow
nnnnby entering working pressure and
nnnntemperature parameters
nnnnMeasuring range
nnnn0.3 ... 120 m/s air/gases
nnnn0.03 ... 10 m/s water/
nnnnliquids
nnnnFunctional principle
nnnnvane wheel flow sensor
nnnnsensing the vane rotation;
nnnnnon-contact by means of
nnnninductive proximity switch
nnnnDesign
nnnninsertion probe with Ex-d
nnnnhousing
nnnnExamples of application
nnnnflow measurement e.g. of air,
nnnnexhaust gas, process gas
nnnnin processes with varying
nnnnand/or unknown gas com-
nnnnpositions
nnnnflow monitoring in pharma-
nnnnceutical installations
nnnnmonitoring inertisation
nnnnprocesses
nnnnmeasurement of flammable
nnnnliquids
nnnnmeasuring in non-conducting
nnnnliquids such as ultra pure
nnnnwater, for example in the
nnnnsemiconductor industry
nnnncompact design with
nnnnoptional on-site display in
nnnnEx-application
nnnnapplication in category 1
nnnn(zones 0 and 20),
nnnntransducer housing
nnnnapproved for Category 2
nnnn(zones 1 and 21)
nnnnno external isolation/supply
nnnnunit necessary
nnnnHumidity in the sample gas
nnnnrelative gas humidity of less
nnnnthan 100 % has no impact
nnnnon the measurement
nnnnuncertainty
nnnnMedium
nnnnair, gas mixtures and clean
nnnngases
nnnnwater, liquids with viscosities of
nnnnup to 200 cSt
nnnnAdvantages
nnnnaccurate measured values even
nnnnin varying and/or unknown gas
nnnncompositions
nnnnParticles in the medium
nnnncan cause restriction in the
nnnnfatigue strength of the
nnnnvane wheel set
nnnnU383_ZS25 Exd_DoP_e_120420 http://www.hoentzsch.com 1/8
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