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Highly accurate. Non-invasive. Until now, you had to choose
between these features. Now get both with the Fuji Electric
Duosonics hybrid ultrasonic flow meter. Duosonics is the
world’s first ultrasonic flow meter that automatically
switches between Pulse Doppler and Transit Time technologies
depending on the fluid conditions in the pipe.
Duosonics excels in difficult applications where other
meters fail. Do you have short straight pipe runs with
undeveloped flow? Do you have an application where different
fluids run through the same pipe? From ultra-pure water to
sludges and slurries, this ultrasonic flow meter can handle
it.
Users can measure the velocity profile in the pulse Doppler
mode, resulting in higher accuracy. This makes the meter
well-suited for applications with undeveloped flow and/or
short straight pipe runs. The pulse Doppler mode requires
suspended particles/bubbles in liquid to reflect the signal
and is suitable for opaque liquids.
The transit time mode uses ultrasound penetration and is
suitable for “clean” liquids.
This ultrasonic flow meter from Fuji Electric automatically
switches between these modes in response to changing fluid
conditions such as the concentration of particles and/or air
bubbles. The Duosonics’ hybrid technology means that it can be
used in virtually any fluid measurement application.
Applications
- Yogurt, dressing, juice with pulp
- Sugar liquid, milk
- Crude oil
- Wastewater/sewage monitoring
- Paint
Technology Explained – Measurement Principles
Transit
Time ultrasonic flow meters are well-suited for relatively
clean fluids with low to moderate aeration. Transit Time flow
meters operate by comparing the time for a signal to travel
with the flow (downstream) against the time for a signal to
travel against the flow (upstream). The difference between the
transit times is proportional to the flow, and the flow meter
converts it to flow rate and total.
Doppler ultrasonic flow meters are optimized for measuring
high solid-content fluids such as sludges and slurries.
Doppler flow meters operate by sensing the frequency shifts of
signals reflected from moving particles, bubbles, or density
differences within a liquid – and producing a linear signal
proportional to the flow of the liquid within the pipe. The
flow meter converts these frequency shifts to flow rate and
total.
With both Transit Time and Doppler technologies, the
transducers are mounted on the outside of the pipe, providing
tremendous advantages over more traditional and invasive flow
measurement instruments.
These benefits include:
- No system downtime for installation
- No system contamination
- No pressure drop
- No moving parts
- No risk of leaks (simplifies regulatory approval)
- Virtually maintenance free
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