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.
| Campbell Scientific, Inc. | |
|---|---|
| Product Category | Weather Instruments |
| Product Number | TB4-L |
| Product Name | 8" Tipping Bucket Rain Gage |
| Device Classification | Sensor Only |
| Weather Component Sensed | Measures Rain/Snow Fall |
| Output Options | Switch or Relay Contact |
| Measurement Increment | 0.0100 inch (0.2540 mm) |
| Accuracy | 2 (+/- %) |
