WORLD METEOROLOGICAL ORGANIZATION |
HOMS COMPONENT |
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Explanation of the criteria for classification and numbering of components |
C71.3.10 (JUN 00) |
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Explanation of the dates on the component's description | ||
ACOUSTIC WATER LEVEL GAUGE |
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1. Purpose and objectives To measure
water level without contacting water's surface. 2. Description The Acoustic
Water Level Gauge is a device for continuous measurement of water
level for rivers and dams. As the gauge utilises a
transmitter-receiver that operates on an ultrasonic wave reflection
method, it can measure water level without actually coming into
contact with the water. A pole or beam is needed to install the gauge. The accuracy
is within 1cm and the range is 13.5m. 3. Input Actual water
level. 4. Output
Water level on a digital data display, as a digital signal (B.C.D.)
or an analogue signal (0V-5V DC and 4mA-20mA DC). 5. Operational requirements and restrictions The
transmitter-receiver should be at 1.5m from the surface when
the water is at its highest possible level and at a maximum of
15m when water level is at its lowest possible. Avoid exposed
objects near the beam that might give spurious reflections. 6. Form of presentation A catalogue
and instrument specifications are available. 7. Operational experience About 120 sets
were installed in Japan in 1999. 8. Originator and technical support Yokogawa
Denshikiki Co.,Ltd. 9. Availability From the HOMS
National Reference Centre for Japan. 10. Conditions on use Hardware is
for sale.
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(First entered: 01 FEB 93 | Last updated: 21 APR 00) |