Vortex Flow Sensor Exactflow II - U4100 pages

Vortex Flowmeter
ExactFlow II

Flowmeter for precise measurement of gas mass flow with long-term stability and
high level of accuracy, under extreme conditions, also for applications in condensate
and particle laden gases

Measurable variables
• gas mass flow
• standard flow rate
• actual flow rate
• pressure
• temperature

Examples of application
• engine test stations
• filter testing devices
• valve test benches
• turbocharger test stands
• climatic test chambers

Medium
• single-phase gases or gas
mixtures with air, nitrogen,
oxygen, methane, natural
gas, carbon monoxide,
carbon dioxide, argon as
dominant components

Design
• measuring tube with
integrated transducer and
flow straightener

Functional principle
• measurement of vortex
shedding frequency f
combined with absolute
pressure and temperature
measurement
• ultrasonic detection of the
vortex

Advantages
• long-term stability even
under extreme conditions
• high turndown ratio (1:100)
• no moving parts
• corrosion resistant
• fast response time
• low pressure drop
• easy to use
• no separate evaluation unit
necessary
• easy to install

Particles, condensate,
humidity in the gas
• loading with particles such
as dust and fibres does not
affect the measurement,
as long as there are no
deposits or abrasions on the
sensor

• relative gas humidity of less

than 100 % does not affect
the measurement
uncertainty

Kármán vortex street

• .

U410_Exactflow II_DoP_e_120605

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