TB3 Tipping Bucket Raingauge


The Hydrological Services Tipping Bucket Raingauge is recognised as the world standard for measuring rainfall and precipitation in remote and unattended locations.
The integrated syphon mechanism delivers high levels of accuracy across a broad range of rainfall intensities. Each unit consists of a collector funnel with stainless steel leaf filter, an integrated syphon control mechanism, an outer enclosure with quick release fasteners, and base which houses the tipping bucket mechanism. The unit includes dual output reed switches with varistor protection as well as dual rainfall discharge outlets for water collection and/or analysis. The bucket tips when precipitation of 0.01 inch, 0.2mm, 0.5mm or 1.0mm has been collected. Each tip activates a reed switch closure which is detected by a Data Logger and/or Telemetry System.

The Tipping Bucket Raingauge can be used in conjunction with Hydrological Services data logger model RRDL3. The logger is rugged and compact, it records the date and time of occurrence of tips from the raingauge up to 55,000 events can be stored in the RRDL3's memory. The data is stored in a flash EPROM. The RRDL3 fits inside the TB3 Raingauge or is housed as a freestanding data logger. The compact design of the RRDL3 makes it ideal for incorporation into any piece of equipment where intelligent data acquisition and logging are required.


  • Receiver: 200 mm + 0.3 diameter machined aluminium rim. Powder coated
  • Bucket capacity: 0.1mm or 0.2mm or 0.5mm of rainfall
  • Sensitivity: one tip
  • Measuring range: 0 to 700 mm / hr
  • Calibration accuracy: + 2 % for intensities from 25 to 500 mm/hr
  • Long term stable calibration
  • Humidity: 0 to 100 %
  • Temperature: - 20 to +70 Degree Celcius
  • Contact system: dual reed switches potted in soft silicon rubber with varister protection
    • Max Capacity: 12 VA (0.5 amp max.)
    • Resistance: Initial contact resistance 0.1 OHMS
    • M.T.B.F: 10 exp8 to 10 exp9 Operations

  • Syphon: 0.4 mm capacity of rainfall - made from brass with a non hydroscopic outer body
  • Bucket: chrome plated, injection moulded non hydroscopic ABS balanced;0.05 gms
  • Base: diecast aluminium
    • Outer cover secured with screws to a base supporting the tipping bucket mechanism.
    • Dual output reed switch
    • Insect screens are fitted to all outer openings

  • Level: bulls eye level adhered to aluminium base
  • Mounting holes: three 10 mm diameter mounting holes with 117 mm p.c.d. cast in feet attached to outside diameter of base
  • Drain fittings: able to attach 12 mm inside diameter tubing, to catch rainfall after passing through buckets
  • Pivots: ground sapphire pivots with hard stainless steel shaft
  • Height: 342mm (13.5"); Weight: 3 kg (6.6 lbs)
  • Packed Dimensions: 4.2 Kg, 0.03 cubic metre (9.3 lbs, 1.1cuft)
  • Resolutions of 0.2mm or 0.5mm

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TB3 0.1mm Brochure

File Size 271KB   Filename tb301.pdf   Download

TB3 0.2 and 0.5mm Brochure

File Size 475KB   Filename tb3.pdf   Download