The TB4-LC, manufactured by Hydrological Services, has an 8" orifice and measures rainfall in 0.01" increments. It contains an internal siphon mechanism that causes rain to flow at a steady rate to the tipping bucket mechanism (regardless of intensity).
The "-LC" version of this product terminates in a connector (instead of pigtails) for use with a CS110 Electric Field Meter or MetData1 Weather Station. The length of the cable is specified at the time of order.
The TB4 funnels precipitation into a bucket mechanism that tips when filled to its calibrated level. Each tip is marked by a dual reed switch closure that is recorded by a data logger 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 TB4 contains an internal siphon mechanism that causes rain to flow at a steady rate to the tipping bucket mechanism (regardless of intensity). The siphon allows the sensor to make accurate measurements over a range of 0 to 700 mm per hour.
| Sensor Type | Tipping bucket with siphon |
| Accuracy |
|
| Resolution | 0.01 in. (0.254 mm) |
| Measurement Range | 0 to 700 mm/hr (0 to 27.6 in./hr) |
| Temperature Range | 0° to 70°C |
| Humidity | 0 to 100% |
| Cable | Two-conductor shielded |
| Orifice Diameter | 20 cm (7.9 in.) |
| Drain Tube Size | Both filters accept 12 mm (0.47 in.) inner diameter tubing. |
| Height | 33 cm (13 in.) |
| Weight | 2 kg (4.4 lb) with 7.62-m (25-ft) cable |
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