TB4-L

Hydrological Services 8" Tipping Bucket Rain Gage

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The TB4 rain gage is manufactured by Hydrological Services Pty. Ltd. Rain funnels into a tipping bucket mechanism that tips when 0.01 inches (0.25 mm) of rain has been collected. Each tip is marked by a dual reed switch closure that is recorded by a Campbell Scientific datalogger pulse count channel. After measurement, the water drains through two orifices (accepts 12 mm tubing) in the base, allowing the measured water to be collected in a separate container.

The rain gage includes a siphoning mechanism that allows the rain to flow at a steady rate to the tipping bucket mechanism regardless of rainfall intensity. This reduces typical rain bucket errors and produces accurate measurements, enabling the TB4 to record intense rainfall events.


Features

  • Tips at 0.01" increments
  • Siphoning mechanism minimizes typical rain bucket errors
  • Orifice diameter is 7.9"
  • Accuracy is ±2% at 1" to 19.7"/hr
  • Resolution is 0.01"
  • CM240 Mounting/Leveling Base recommended
  • Manufactured by Hydrological Services Ltd.

Specifications

  • Orifice Diameter: 7.9" (20 cm)
  • Drain Tube Diameter: Both filters accept 12 mm ID tubing
  • Accuracy: better than ±2% @ 19.7”/hr (25 to 500 mm/hr)
  • Resolution: 0.01" (0.254 mm)
  • Measurement Range: 0 to 27.6"/hr (0 to 700 mm/hr)
  • Temperature: 0° to 70°C
  • Humidity: 0 to 100%
  • Weight: 4.4 lbs (2 kg)
  • Height: 13" (33 cm)