|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
CRYSTAL QUARTZ WATER LEVEL GAUGE
1. Purpose and objectives
water level of dams, reservoirs and tidal level as well as water
level of rivers with broader measuring range, 10m - 70m, by
one sensor. Thus, this is a superb water level gauge from an
economical point of view, too. Simple construction method and
maintenance are another merit.
of the Crystal Quartz Water Level Gauge reflects pressure stress
fluctuations in such a way that any change in water level, that
is water pressure in this case, converts itself into equivalent
This water level gauge can function fully automatically as a system for water level measurement and recording.
The frequency seized as output of the sensor allows a direct measurement of change in water level as a digital quantity. This sensor enjoys a high resolution due to an excellent conversion rate and a large change in frequency as a function of pressure.
not susceptible to any acceleration and gravity, it does not
suffer any deterioration of its characteristics thereby ensuring
far smaller power consumption.
accompanying a change in water level.
output of this unit is water level BCD signals to be delivered to
telemeters and dam control systems. When combined with
digital printers/recorders or with analogue recorders, it is
versatile in any recording of water level desired.
5. Operational requirements and restrictions
Except for civil engineering works necessary for construction of the facilities to install this unit, the number of professional level personnel for its installation, operation and maintenance is of at least two.
In case of recording the data measured at the recorder site, it is necessary to replace the paper tape periodically (about every 6 month: paper tape is required for 6 month use with max. one hour printing per day).
When battery is used as the only power source, it is also necessary to replace it for a charged battery periodically.
Ambient temperature is -10 to +40 °C for the sensor, but no freezing is allowed. It is -10 to +40 °C for the coder, with humidity 20 to 90 %, no condensing is allowed.
There are 4
different ranges of water level measurable: 0 to 10 m, 0 to 20 m,
0 to 30 m, 0 to 70 m.
6. Form of presentation
and specifications of the instrument and home page are available.
7. Operational experience
in more than 900 places may answer for the reliability of this
water level gauge, which has been in use since 1984. Several
units have been exported to Indonesia and China.
8. Originator and technical support
10. Conditions on use
The hardware is for sale.
|(First entered: 1 FEB 93||
Last updated: 21 APR 00)