Envitech
Ltd are pleased to present the Mainstream Area Velocity range
which comprises both fixed site and portable versions.
Measurement
Principle
Mainstream
uses the area-velocity method to give a continuous or time
sample measurement of fluid flow. Using a streamlined probe
that operates immersed in the flowing liquid, the velocity
probe transmits ultrasound into the liquid to create a zone
of inspection. Bubbles and solid particles carried through
this zone by the flow, even when present in only minute quantities,
reflect ultrasound back to the probe. Only high quality signals
containing verified velocity information are processed, thereby
ensuring measurement integrity. This measured frequency shift
in the ultrasound signals gives flow velocity. The verified
velocity signals produce a histogram of the flow velocities.
Analysing this histogram gives the mean flow velocity.
Liquid level is measured by a submerged pressure transmitter,
or ultrasonic sensor. The
flow cross-sectional area is deduced from the liquid level
measurement and the stored description of the channel or pipe
cross section. The flow rate is the flow velocity multiplied
by the flow cross-sectional area.
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The Mainstream
Area Velocity Flow Meter is ideal for sites where submerged,
full pipe, surcharged or reverse flows may occur.
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Benefits:
- Quick
to install - no weirs or flumes
- High
sensitivity - extends applications to 'clean' water
- Powerful,
easy to use PC software simplifies flowmeter commissioning
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Streamlined velocity probe eliminates fouling and reduces
flow disturbances
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New Smart power saving mode for portable unit - intelligent
use of power saving which automatically reduces the measurement
time for high flow velocities and high signal qualities
and increases the measurement time for low velocities
and low signal qualities
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And many more ….
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Features:
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Bi-directional flow measurement for forward and reverse
velocities from 10 mm/S up to 5m/S
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Sophisticated ultrasound processing ignores spurious signals
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Ultrasound signal quality monitor confirms measurement
integrity
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High capacity data logger for permanent records of level,
velocity and flow rate
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Opto-isolated switch outputs for alarms and controls
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And many more ….
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