|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
RADIO WATER CURRENT METER
1. Purpose and objectives
To measure the
water current speed without contacting the water surface.
The Radio Water Current Meter is designed for remote measurements in situations that require that there be no contact between the measuring equipment and the water surface. It measures the water current speed by detecting the change in frequency of the reflected radio wave from the surface of water current. Typical measuring sites include rivers, irrigation channels and drainage sluices. A major feature is that it can be used to measure current speed at sites with high water levels and rapid currents, frequently changing river beds, and currents that are harsh as a result of pebbles, debris, and objects in the water.
The range of
speeds measured is 0.5m/s -10m/s with an accuracy of 1% of full
provides an analogue signal in the range of 0V-1V DC, a digital
output on an RS-232C port and a digital display.
5. Operational requirements and restrictions
uses a 10.525 GHz radio wave and this will require registration
with the radio frequency allocation authorities. A
regulated power supply is required. Water waves on the surface of
the current are needed to ensure good reflection of the radio
waves. The instrument must be within 20m of the water surface.
6. Form of presentation
and instrument specifications are available.
7. Operational experience
About 10 sets
were installed in Japan in 1999.
8. Originator and technical support
10. Conditions on use
|(First entered: 01 FEB 93||
Last updated: 21 APR 00)