024A-L
024A-L
RetiredWind Direction Sensor
No longer available to order
This product is retained for service, documentation, and compatibility information.
- Model:
- 024A-L
- Item Number:
- 2011
- Warranty:
- 1 year
Overview
The 024A, manufactured by Met One, is a wind vane that measures wind direction only. You can use it in tandem with the 014A Wind Speed Sensor; however, this combination has been largely replaced by the 034B, which monitors both wind speed and wind direction.
Key Advantages
Compatible with most Campbell Scientific data loggers
Technical Description
The 024A Wind Vane measures wind direction from 0 to 360 degrees with a 5 degree accuracy specification. Wind direction is sensed with a 10 kohm potentiometer. With the precision excitation voltage from the data logger applied to the potentiometer element, the output signal is an analog voltage that is directly proportional to the azimuth of the wind direction.
Specifications
- Sensor
- Vane
- Measurement Description
- Wind direction
- Operating Range
- 0 to 360°
- Threshold
- 0.45 m s-1
(1.0 mph)
- Accuracy
- ±5°
- Operating Temperature Range
- -50° to +70°C
(assumes non-riming conditions)
- Delay Distance
- < 1.5 m
(5 ft)
- Damping Ratio
- 0.25
(standard)
0.4(optional fast response)
- Resolution
- 0.5°
- Height
- 33.8 cm
(13.3 in.)
- Length
- 44.7 cm
(17.6 in.)
- Vane Height
- 30.5 cm
(12 in.)
- Vane Width
- 7.6 cm
(3 in.)
- Weight
- 450 g
(1 lb)
Potentiometer
- Sand, Dust, and Fungus
- MIL-E-5272
- Salt Spray
- MIL-E-12934
- Resistance
- 0 to 10 kΩ
Common Accessories
(4)17953
1- x 1-in. Nu-Rail Crossover Fitting
This NU-RAIL® Slip-on Offset Crossover fitting can be used as an alternative to the CM220. It attaches the sensor to a CM200-series crossarm.
OrderableCM221
Right-Angle Mounting Kit
The CM221 mounts a pipe or tube at 90° to another pipe or tube. It is typically used to attach a sensor with a vertical pipe (including most wind sensors) to a crossarm. The cast aluminum, right-angle mounting bracket has 3.8 cm (1.5 in.) U-bolts and hardware and will accommodate tubing with a 1- to 1.5-in. outer diameter.
OrderableCM216
Sensor Mounting Kit for Top of Tripod Mast
The CM216 Sensor Mount provides a connection point for this sensor to be attached to the top of a CM106B, CM110, CM115, or CM120 Tripod.
Orderable39115
DIN Rail Terminal Kit with 2 Terminals and 4 Wires
The 39115 provides the needed DIN rail terminals, separator, and wires to connect any product to a data logger or other peripheral that requires four wires for connection. This kit provides the following wires: black, red, white, and clear. The color-coding of these wires matches the wire coloring of the product for ease in connection, maintenance, and troubleshooting.
Orderable
Replacement Parts
(3)024ACBL
Replacement Cable for 024A Wind Vane
The 024ACBL cable consists of 22 AWG conductors insulated in polypropylene and shielded in a 2-twisted pair configuration; the cable jacket is composed of Santoprene®. The 024ACBL has a 6-pin, mil-spec connector and user-specified cable length. A 1K 0.01% completion resistor is included in the pigtail.
Orderable16901
014A, 024A, or 034A Replacement Turret Label
The 16901 turret label is easily replaced by the customer. This label serves to repel water and is placed over the small access hole in the turret to reduce ingress by water.
Orderable2905
Replacement Potentiometer for 024A or 034A
The 2905 10K potentiometer is difficult to replace, and requires recalibration after replacement. Factory replacement is recommended (bearings are also replaced).
Orderable
Compatibility
Mounting
The 024A can be attached to a crossarm via a 17953 NU-RAIL fitting or a CM220 Right Angle Mounting Bracket. Alternatively, the 024A can be attached to the top of a CM106B or a stainless-steel tripod via the CM216 Sensor Mounting Kit. The CM216 extends 4 in. above the mast of the tripod.
Data Logger Considerations
The 024A uses one single-ended input channel on the data logger. An excitation channel is required but due to the high impedance of the 024A, can be shared with other high impedance sensors.
Programming
The 024A is read by the BrHalf instruction in CRBasic and by Instruction 4 (Excite-Delay-Single-ended Measurement) in Edlog.
