The TB4, manufactured by HS Hyquest Solutions, is a high-end tipping bucket rain gage that has an 8 in. orifice and measures rainfall in 0.01 in. increments. It is ideal for locations where intense rainfall events may occur. This tipping bucket is compatible with all Campbell Scientific dataloggers, and is used in environmental monitoring applications.Read More
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 50 cm per hour.
|Sensor Type||Tipping bucket with siphon and dual reed switch|
|Rainfall per Tip||0.254 mm (0.01 in.)|
|Measurement Range||0 to 700 mm/h (0 to 27.6 in./h)|
|Operating Temperature Range||0° to 70°C|
|Humidity Range||0 to 100%|
|Cable Type||Two-conductor shielded|
|Drain Tube Size||Both filters accept 12 mm (0.47 in.) ID tubing.|
|Orifice Diameter||20 cm (7.9 in.)|
|Height||33 cm (13 in.)|
|Weight||2 kg (4.4 lb) with 7.62 m (25 ft) signal cable|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
The base of the gage is supported by three legs. A CM240 Leveling Base and Mount or a user-supplied baseplate with leveling capability is recommended. The CM240 may be attached to a CM300-series mounting pole, or to a user-supplied 1.5 IPS (1.9-inch outer diameter, unthreaded) pipe (see Ordering Information). A concrete pad is recommended.
Campbell Scientific offers the 260-953 Wind Screen to help minimize the affect of wind on the rain measurements. This wind screen consists of 32 leaves that hang freely and swing as the wind moves past them.