The Hydrological Services Model TB4 with injection moulded base 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 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.
- World standard 200mm catch
- Bucket: two types of buckets, synthetic ceramic coated brass bucket balanced to 0.05 gms for 1mm bucket only , and injection
  moulded non hydro-scopic plastic ABS chrome plated UV stabilised balanced 0.05 gms for 0.2mm, 0.5mm and 0.01.
- Bucket capacity:  Plastic: 0.2 mm, 0.5 mm,0.01 inch of rainfall.
              Metal: 1.0 mm of rainfall

Accessories:
- Data Logger ML1/ML1-FL
- RS232 to USB Converter DL307
- Field Calibration Device TB320 / FCD
- TB3 Bird Guard TB333
- TB3 Pole Mounting Bracket TB334