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)
