Vortex Flow Sensor VA Di ZG1 Ex-d - U3500 pages

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Vortex Flow Sensor VA Di Ex-d

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Measurable variables

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actual flow rate

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actual velocity

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standard volume flow (in

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combination with pressure

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and temperature sensors)

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Design

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measuring tube with flanged

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connection

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Kármán vortex street

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Functional principle

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vortex meter for flow rate

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and volume measurement

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ultrasonic recording of the

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vortex shedding

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Advantages

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compact measuring

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instrument with on-site

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display in Ex-application

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application in Category 1

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(Zone 0 and 20), transducer

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housing approved for

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Category 2 (Zone 1 and 21)

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no external isolation/supply

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unit necessary

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records even the slightest

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flow rates, due to patented

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ultrasonic sensing

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high measuring dynamics

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(up to 1 : 100)

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no moving parts

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easy to clean

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high fatigue strength

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corrosion resistant

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operates to a large extent

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irrespective of gas

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composition

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low pressure drop

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easy configuration via

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HART® interface

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Messmedium

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Primarily single-phase gas

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mixtures with air, nitrogen,

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oxygen, methane, natural

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gas, torch gas, ammonia,

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argon, carbon monoxide,

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water vapour ... as

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dominant components,

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combustion process of waste

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gases, biogas, sewer gas.

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Other gases on request.

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Examples of application

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flow measurement in Ex-

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application, for example, of air,

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outgoing air, sludge activation air,

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engine intake air, natural gas,

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exhaust gas, process gas, biogas,

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motor car exhaust, torch gas,

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water vapour

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Particles, humidity and

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condensation

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charges in the gas caused

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by particles such as dust

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and fibres do not affect

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measurement, as long as

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abrasion and agglomeration

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do not occur on the sensor

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relative gas humidity of less

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than 100 % and slight

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condensation on the sensor

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do not affect the

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measurement uncertainty

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U350_VADi Exd_DoP_e_120417 http://www.hoentzsch.com 1/6

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