TB4MM
TB4MM
OrderableMetric Rain Gage with 8 in. Orifice
Pricing
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Configuration
- w/10m (33 ft) per Sensor w/Ferrules on WiresTB4MM-10mPart Number: 45207-10m
- w/20m (66 ft) per Sensor w/Ferrules on WiresTB4MM-20mPart Number: 45207-20m
- w/30m (100 ft) per Sensor w/Ferrules on WiresTB4MM-30mPart Number: 45207-30m
Select a configuration to add to your quote
- Model:
- TB4MM
- Item Number:
- 45207
- Warranty:
- 1 year
Overview
The TB4MM, manufactured by HS Hyquest Solutions, is a high-end tipping bucket rain gage that monitors rainfall in metric rather than US units. It has a 20.3 cm orifice and measures rainfall in 0.2 mm increments. The TB4MM is ideal for locations where intense rainfall events may occur. This tipping bucket is compatible with all Campbell Scientific data loggers, and it is used in environmental monitoring applications.
Technical Description
The TB4MM 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 TB4MM 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.
Benefits
- More accurate measurement of high-intensity precipitation
- High precision—tips at 0.2-mm increments
- Compatible with most Campbell Scientific data loggers
- Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
Specifications
- Sensor Type
- Tipping bucket with siphon and dual reed switch
- Rainfall per Tip
- 0.2 mm
(0.008 in.)
- Measurement Range
- 0 to 700 mm/h
(0 to 27.6 in./h)
- Measurement Uncertainty
- ±2% @ < 250 mm/h
(9.8 in./h)
±3% @ 250 to 500 mm/h(9.8 to 19.7 in./h)
700 mm/h(27.6 in./h) maximum rate per hour
- 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
Common Accessories
(6)CM240
Leveling Base and Mount for Rain Gages
The CM240 base helps level the TB4MM—ensuring more accurate measurements. The base attaches to a CM300-series mounting pole or to a user-supplied 1.5 IPS (1.9" OD) pipe. The pipe should be long enough to place the gage's orifice one meter above the ground.
Orderable260-953
Alter-Type Rain Gage Wind Screen
This wind screen consists of 32 leaves that hang freely and swing as the wind moves past them. The 260-953 helps minimize the affect of wind on the rain measurements.
OrderableCM300
23 in. Mounting Pole with Cap
The CM300 provides a 23-inch long pole for mounting the CM240 Leveling Base. This pole can be embedded directly into a concrete foundation or used with a pedestal kit. Campbell Scientific offers a j-bolt pedestal kit for permanent installations; a short leg kit for many temporary installations and many situations where it is impractical to use a concrete foundation; and a long leg kit for locations where the feet cannot be secured (e.g., pole sitting on a roof) or for areas that experience high wind speeds.
OrderableCM305
47 in. Mounting Pole with Cap
The CM305 provides a 47-inch long pole for mounting the CM240 Leveling Base. This pole can be embedded directly into a concrete foundation or used with a pedestal kit. Campbell Scientific offers a j-bolt pedestal kit for permanent installations; a short leg kit for many temporary installations and many situations where it is impractical to use a concrete foundation; and a long leg kit for locations where the feet cannot be secured (e.g., pole sitting on a roof) or for areas that experience high wind speeds.
OrderableCM310
56 in. Mounting Pole with Cap
The CM310 provides a 56-inch long pole for mounting the CM240 Leveling Base. This pole can be embedded directly into a concrete foundation or used with a pedestal kit. Campbell Scientific offers a j-bolt pedestal kit for permanent installations; a short leg kit for many temporary installations and many situations where it is impractical to use a concrete foundation; and a long leg kit for locations where the feet cannot be secured (e.g., pole sitting on a roof) or for areas that experience high wind speeds.
Orderable39112
DIN Rail Terminal Kit with 1 Terminal and 3 Wires
The 39112 provides the needed DIN rail terminals, separator, and wires to connect any product to a data logger or other peripheral that requires three wires for connection. This kit provides the following wires: black, white, and clear. The color-coding of these wires matches the wire coloring of the product for ease in connection, maintenance, and troubleshooting.
Orderable
Ships With
(1)- Allen wrench from original mfg
Compatibility
Mounting
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.
Wind Screen
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.
