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Geonor Associates
GEONOR, Inc,
P.O. Box 903
109 Greenwood Circle
Milford PA
18337
Tel: 570-296-4884
Fax: 570-296-4886
geonor@geonor.com
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T-200B Series Precipitation Gauge
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T-200B
Precipitation Gauge Brochure
T-200B
- 18 hr. Precipitation Event
PHOTOS
OF INSTALLATIONS
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Options
- 600 or 1,000mm Capacity
- 1 sensor or 3 sensor guage
(a 3 sensor guage is used for redundancy.)
THE
ORIGINAL PAPER ARGUING FOR THE USE OF A LOAD CELL TO RECORD
PRECIPITATION.
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DESIGN
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The T-200 series precipitation gauge is designed for year
round measurements of accumulated precipitation (solid or
liquid) as well as precipitation intensity. The gauge consists
of a protective housing with a 200cm^2 inlet for precipitation
and a collection bucket. The amount of precipitation is measured
by GEONOR’s unique vibrating-wire weighing transducer.
In the standard set-up the gauge as well as a windshield,
are fixed to a rigid pedestal. Despite its simplicity, the
gauge is very accurate and easy to install and maintain.
For solid precipitation the catch is melted in the collection
bucket to which antifreeze has been added. A film of low viscosity
oil is used to impede evaporation. The gauge was designed
to function in remote areas without heating;with proper power
supply from batteries and solar panels electrical inlet heaters
can be used to prevent or minimize "capping" of
inlet. (See photos of installations.)
The T-200 series gauges were developed in 1985. The gauges
supplied at that time are still continuously monitoring for
various meteorological agencies. They are used worldwide by
weather services, transportation agencies, power companies,
avalanche prediction services and agricultural agencies. In
comparison tests with other gauges, National Center for Atmospheric
Research (NCAR) the Climate Reference Network (CRN) and the
World Meteorological Organization/Commission for Instrument
& Methods of Observation (WMO/CIMO) ranked the T-200 first.
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Measuring Principle
There are no moving parts. The precipitation, oil and antifreeze
in the container are weighed with a sensor giving a frequency
output. The frequency will be a function of the tension applied
to the vibrating wire. Simply put, the frequency increases
as precipitation collected increases. The measuring principle
is well suited for remote locations requiring reliable and
long-lasting instruments.
The amount of precipitation can be measured at interval from
seconds to weekly. This will be determined by the programming
of the Data Logger in use.
Geonor supplies interface card for most programmable data
loggers.
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