Rain Gauge RG13

Rain gauge, with heating option, designed for measuring liquid precipitation in remote and unattended locations

Model: RG13
Manufacturer: Vaisala – Finland

Features

  • Designed to measure rainfall / liquid precipitation
  • Tipping bucket principle
  • Suitable for remote and unattended locations
  • Provides accurate measurements
  • Economical and proven in operation
  • Robust system component
Category:

Vaisala Rain Gauge RG13 and Vaisala Rain Gauge RG13H with heating option are designed for measuring liquid precipitation.

RG13(H) uses a pulse-based tippingbucket mechanism to produce a contact closure every time it receives a predetermined quantity of rainfall (0.1 mm / 0.2 mm / 0.5 mm).

The body and funnel of the gauge are aluminum alloy. The septum ring at the top gives an aperture of exactly 400 cm2 (62 in2).

The tipping-bucket mechanism is mounted inside the body on a cast aluminum-alloy base that has fixing slots, 3 leveling screws, and a spirit level. The mechanism consists of a divided bucket pivoted at its center. Rain collects in the upper half. When this is full, the mechanism tilts and discharges the collected water, so that the other half of the bucket can start filling.

A siphon device is fitted to the base of the funnel to control the rate of flow into the buckets. By ensuring a constant flow rate into the tipping bucket, calibration is made easier and accuracy improved. The heating turns on when the temperature drops below +4 °C (+39 °F)

 

Measurement Performance

 

Precipitation Liquid 
Accuracy 2 % at 1 l/h (0.26 gal/h)
Diameter of aperture 225 mm (8.86 in) 
Area of aperture 400 cm2 (62 in2 )

with expander unit: 1000 cm2 (155 in2 )

Rainfall capacity Unlimited
Resolution Standard: 0.2 mm (0.008 in) 

Optional tipping mechanism: 0.1 mm (0.004 in) 

Optional tipping mechanism: 0.5 mm (0.02 in)

Closure time < 100 ms (for 0.2 mm / 0.008 in of rain)

 

Operating Environment

 

Operating temperature RG13: +1 … +85 °C (+33.8 … +185 °F) RG13H: -20 … +85 °C (-4 … +185 °F)
Storage temperature -40 … +85 °C (-40 … +185 °F) 
Heating 1)
Heating connection/disconnection at +4 °C
Heating power RG13H: 33W / 48 VDC 

RG13J: 33W / 24 VDC

 

1) Heating is available in RG13H

 Mechanical Specifications

 

Dimensions (H × Ø) 338 × 248 mm (13.31 × 9.76 in)
Weight 2.6 kg (5.73 lb)
Material
Base, septum ring Aluminum alloy LM25
Outer ring, funnel Aluminum alloy sheet
Inlet/outlet ports, pins Stainless steel
Tipping mechanism Injection moulded plastic
Transducer Reed switch
Output
Circuit Contact closure
Connection Screw terminal
Life (operations) 108 closures

Rain Gauge RG13, RG13H

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