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Vortex flow sensor VAR TwinPip0 pages
Vortex flow sensor VAR TwinPipe
nnnnwith directional sensing of flow
nnnnMeasurable variable
nnnnstandard flow velocity v [m/s]
nnnnMedium
nnnnair, exhaust air
nnnnRange and examples of
nnnnapplication
nnnnmeasurement of flow in traffic
nnnntunnels, mines and waste disposal
nnnnsites
nnnncontrol of air ventilation
nnnnMeasuring range
nnnn±0.4 ... ±25 m/s
nnnnFunctional principle
nnnnvortex meter for measuring
nnnnflow velocity
nnnnultrasonic measurement of
nnnnthe vortex shedding
nnnnDesign
nnnnvortex twin flow sensor
nnnnAdvantages
nnnncost-efficient
nnnnrobust, maintenance-free and
nnnnnonwearing, as no moving parts
nnnnhigh fatigue strength and long-
nnnnterm stability
nnnnreliable, even in extreme
nnnnconditions
nnnnunlike other measuring systems
nnnnno on site calibration necessary
nnnnonly one installation point for
nnnnthe entire measuring system
nnnnnecessary
nnnnapplication in Ex-protection
nnnnCategory 3G and 3D (zone 2
nnnnand zone 22) permissible
nnnnParticles, humidity and
nnnncondensation
nnnncharges in the gas caused by
nnnnparticles such as soot do not
nnnnaffect measurements, as long as
nnnngeometric-changing
nnnnagglomerations do not occur on
nnnnthe sensor
nnnnrelative humidity of less than
nnnn100 % does not affect the
nnnnmeasurement uncertainty
nnnnU332_VAR_DoP_e_120413 http://www.hoentzsch.com 1/4
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