• Easy installation and maintenance
• Precipitation intensity can be calculated
• Proven long term reliability
• No moving parts
• Interfaces to most data acquisition systems
• Vibrating wire weighing sensors
GENEQ > Meteorology > Precipitation
| Precipitation Gauge |
| Model T-200B |
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| • More than 25 years of field use • Easy installation and maintenance • Precipitation intensity can be calculated • Proven long term reliability |
• No internal heating required • No moving parts • Interfaces to most data acquisition systems • Vibrating wire weighing sensors |
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Proven long term
reliability |
Design |
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TheT-200 precipitation gauge was
developed more that 25 years ago
for all weather precipitation monitoring.
It was designed in cooperation
with the Norwegian Meteorological
Institute and the Norwegian
Geotechnical Institute.
Precipitation can be reported at
real-time intensity to any interval
required.The precipitation gauge is
simple to configure for use with
automatic data acquisition units. The
standardT-200B has a 600 mm capacity
and one vibrating wire sensor.
1000mm capacity and three sensors
are options.
The gauge has a protective housing
with aWMO standard 200 cm2 inlet.
Inside there is a container for collecting
the precipitation.The amount of
precipitation is measured by using
vibrating wire load sensors.The
instrument as well as a wind shield
is mounted to the pedestal.
With the use of antifreeze any solid
precipitation is melted in the container.
No electrical heating is therefore
required, thus eliminating a common
source of error. A thin layer of oil is
added to impede any evaporation. |
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Applications |
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TheT-200 series precipitation gauges are used world wide by: • National weather services • Climatic research institutes • Hydro power companies • Airport authorities • Road authorities • Agricultural services • Avalanche prediction centres • Winter sport resorts |
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Measuring principle |
The precipitation collected in the
container are weighed with a vibrating
wire load sensor, which gives a
frequency output.The frequency will
be a function of the applied tension
on the wire, i.e. from this, the
amount of precipitation can be computed.
The frequency is recorded as
a square-shaped 0-5 V signal.This
signal can easily be transmitted and
interfaced to most data acquisition
systems.There are no mechanical
moving parts, eliminating other
possible sources of error.
Because of its simplicity and low
power requirement, theT-200B is well
suited for remote locations where
power may only be available from
solar energy.
Geonor supplies interface adaptor
for use with automatic data acquisition
units. Output: 0-5V square wave.
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Options |
1500 MM CAPACITY A version of theT-200B with 1500 mm capacity will be available in 2009.The design will make it possible to retrofit existingT-200B units with the larger capacity. 3 SENSOR SYSTEM Using a 3 sensor system ensures the continuation of data recording if one of the sensors should fail.This is made possible with a level retaining device. It also ensures that the total amount of the precipitation will be measured even if there is a slight deviation from the horizontal plane. Standard single sensor units can easily be upgraded to 3 sensor systems.  WHITE HOUSING The standardT-200B comes with anodized housing and black inlet. The housing, including the inlet, is also available in white. |
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Accessories: |
Easy access windshield hinges
Two hinges on the circumference of the windshield make it possible to raise half of the shield to give clear access to the gauge during servicing and maintenance. Hinges can be installed on existing windshields.  |
Inlet heater system
To prevent capping of the inlet, Geonor can provide inlet heating.The system to be used is dependent on power supply available.  |
Technical Specifications T200B |
Capacity: (including antifreeze) Colleting area: Sensitivity: Accuracy: Repeatability: |
600 mm 200 cm² 0.05 mm 0.1% FS 0.1 mm |
1000 mm 200 cm² 0.075 mm 0.1% FS 0.1 mm |
1500 mm 200 cm² 0.1 mm 0.1% FS 0.15 mm |
Temperature range: Temperature drift: Materials: Size: Mounting: |
Sensor: -40°C to 60°C 0.001% FS/°C Aluminum alloy Ø=390mm, H=760mm (600mm version) Ø=390mm, H=800mm (1000mm version) Ø=390mm, H=1000mm (1500mm version) Universal 3-point with leveling system incorporated in base |
Order references |
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| Part No. System | Part No. Equipment | |
| T-200B | Precipitation gauge, 600 mm, one sensor |
470250Windshield with stainless steel blades |
| 470400 Pedestal, galvanized steel 1 m high | ||
| 470450 Pedestal, galvanized steel 2.5 m high | ||
| 470260 Easy access windshield hinges | ||
| M | 1000 mm capacity | 455060 Excitation units for data loggers, rail mounting |
| MD | 1500 mm capacity | 470600 Sensor 600 mm with level retaining device |
| 3 | 3 sensor system | 471000 Sensor 1000 mm with level retaining device |
| W | White housing | 471500 Sensor 1500 mm with level retaining device |