Category Precipitation/Leaf Wetness : 6 products

Model 52203 Tipping Bucket Rain Gauge. 

The model 52202/ 52203 Tipping Bucket Rain Gauge meets the specifications of the World Meteorological Organization. Extensive use of molded thermoplastic compounds gives maximum performance and resistance to corrosion. 

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[Catchment  area]   200 cm2 
[Resolution]   0.1 mm per tip
[Accuracy]   2 % up to 25mm / h
[Output]   Magnetic reed switch, normally open
[Operating temp]   -20 deg C to 50 deg C (model 52202 is heated for colder climates)
[Measuring Range]   n/a
 
Manufacturer R.M.Young Company

Model TE525mm Tipping Bucket Rain Gauge. 

The TE525 series tipping bucket rain gages are manufactured by Texas Electronics. Both the TE525WS (8" orifice) and TE525 (6" orifice) measure in 0.01 inch increments; the TE525MM measures in 0.1 mm increments. These gages funnel precipitation into a bucket mechanism that tips when filled to a calibrated level. A magnet attached to the tipping mechanism actuates a switch as the bucket tips. The momentary switch closure is counted by the pulse-counting circuitry of Campbell Scientific dataloggers. 

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[Catchment  area]   24.5 cm ( Orifice diameter)
[Resolution]   0.1 mm per tip
[Accuracy]   ±1% up to 10 mm/hr, +0-3% 10-20 mm/hr, +0-5% 20-30 mm/hr
[Output]   Pulse (magnetic reed switch)
[Operating temp]   0° to +50°C
[Measuring Range]   n/a 
 
Manufacturer Texas Electronics

Model CS700L Tipping Bucket Rain Gauge for intense rainfall events.

The CS700 rain gage is manufactured by Hydrological Services Pty. Ltd.'s (ModelTB-3). Rain funnels into a tipping bucket mechanism that tips when 0.01 inches (0.254 mm) of rain has been collected. Each tip is marked by a dual reed switch closure that is recorded by a  datalogger pulse count channel. After measurement, the water empties through drains in the base of the gage. The CS700's syphoning mechanism causes the rain to flow at a steady rate to the tipping bucket mechanism (regardless of rainfall intensity). Because of this, typical rain bucket errors become constant allowing the calibration process to minimize them. This produces accurate measurements for a range of 0 to 19.69" (500mm)/hr enabling the CS700 to record intense rainfall events. 

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[Catchment  area]   200 cm2 Catchment
[Resolution]   0.254 mm per tip
[Accuracy]   2% @ 100mm/hr
[Output]   Pulse (magnetic reed switch)
[Operating temp]   n/a
[Measuring Range]   Measuring Range: 0-500 mm/hr
 
Manufacturer Hydrological Services
 

Model HD2013 Tipping Bucket Rain Gauge connected to a HD2013-Datalogger.

 

The HD2013 is a reliable and sturdy tipping bucket rain gauge, built entirely from corrosion resistant materials in order to guarantee its durability. The rain gauge is formed by a metal base on which a tipping bucket is set. The rain collector cone, fixed to the aluminium cylinder, channels the water inside the tipping bucket: once the predefined level is reached, the calibrated bucked rotates under the action of its own weight, discharging the water. During the rotation phase, the usually closed reed contact opens for a fraction of a second, sending an impulse to the counter. The quantity of rainfall measured is based on the count of the number of times the bucket is emptied: the reed contacts, usually closed, open at the moment of the rotation between one bucket’s section and the other. The number of impulses can be detected and recorded by a datalogger such as the HD2013-D DeltaOhm seen in the picture. For better water flow, the collector cone is treated with teflon® paint.

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[Catchment  area]  

400 cm2
[Resolution]    0.1/0.2/0.5 mm per tip (on request at the time of placing the order)
[Accuracy]   ± 2% between 20 - 300 mm/h
[Output]   Pulse (magnetic reed switch)  
[Operating temp]  

-20 deg C to 50 deg C (model HD2013R, is heated for colder climates)
[Measuring Range]   n/a
 
Manufacturer Delta Ohm
 

Model 237 HD2013.2 rain detector.

The HD2013.2 is a rain detector based on the capacity principle. The capacity value of the sensitive element, on an alumina rest, changes according to the surface dampened by raindrops. An integrated heater keeps it dry, evaporates water and prevents false signals caused by fog or dew. The heater also activates at low temperatures, melting the snow and allowing to detect snow precipitations. The instrument external circular dome acts as a windshield for the sensor, preventing false indications. The instrument is equipped with three different outputs: a “Rain ON/OFF” output, which detects whether it is raining/snowing (ON) or not (OFF), also used to control a relay coil or similar devices; a 0…1V voltage analogue output (calibrated) and a 1,5…6KHz frequency output (not calibrated), which provide an accurate indication of current precipitation intensity. The ON/OFF output comes with a delay circuit that indicates the “rain over” condition with a 2 minute delay, so that the “rain over” condition is distinguished from the “light rain” one. The heater can be disabled when power consumption is critical. To do it, set the Heater OFF input on 0V.If requested when ordering, a bird spike, consisting of a 6-spike ring (spike height: 60mm, diameter: 3 mm), can be mounted.

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[Sensor]  

Type Capacitive, with integrated heater

Sensor 6.6cm2

Angle 30°

[Sensitivity]  

Min. sensitive area 0.05cm2

ON delay/Trip delay (OFF>>ON) < 0.1ms

OFF delay/Shut-off delay (ON>>OFF) < 5min

[Power Supply]  

Supply Voltage 12Vdc ± 10%

Current Consumption 130mA (typical)

230mA (max)

10mA (with heater disabled)

Sensor Power Consumption 0.5 … 2.3W

[Output]  

Rain ON/OFF Open collector, closed in case of rain.

Max. Voltage 15V

Max. Current 50mA

Analogue Output 0…1V (0V = rain, 1V = dry sensor)

Frequency Output 1500 … 6000Hz (rain … dry sensor) Not calibrated

[Operating temp]   Operating Temperature -15 … +55°C
 
 
Manufacturer Delta Ohm
 

Model 237 Wetness Sensing Grid.

The 237 Leaf Wetness Sensor is designed to emulate the surface area of a leaf. It Indicates periods of leaf wetness after rainfall dew or spray.

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[Main features]  

The sensor is a circuit board with interlacing gold-plated fingers. 

  Condensation on the sensor lowers the resistance between the fingers, which is measured by the datalogger.
  Droplets must touch two fingers simultaneously to change the sensor resistance.
  For this reason, this type of sensor is often coated with flat latex paint to spread the water droplets.
  The color and type of paint affect sensor performance. 
 
 
Manufacturer Campbell Scientific
 
 
             

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