Model WS-23 - Current Loop Wind Sensor
The Model WS-23 Current Loop Wind Sensor monitors wind speed and direction. The electronics converts the raw signals from the wind sensors to proportional 4 to 20 mA current loop values for use by process control or monitoring systems. It acts like a variable resistance that draws 4-20 mA when powered with 8 to 30 Vdc. No external power is required because the encoding electronics for wind speed and for wind direction are isolated and powered from their respective 2-wire current loops.
Two versions are offered. The Model WS-23 measures both wind speed and direction, while the Model WS-23S measures wind speed only. Both systems consist of two subassemblies, a wind sensor and a signal conditioning electronics package in a NEMA housing. Although it has only one PC board, it contains two completely independent circuits, one for wind speed and one for wind direction.
The wind sensor includes a three cup anemometer and wind vane. The sensor is ruggedly constructed of UV resistant ABS plastic and anodized aluminum parts, and includes 40` of cable. Additional cable lengths can be supplied. The electronics package is supplied in a gasketed wall mount NEMA enclosure.
Wind Speed
- Speed threshold: 0.8 mph
- Transducer type: Reed switch
- Speed constant: 1.25 mph = 1 pps
- Measurement range: 0-100 mph (standard)
- Optional: 0-50 m/s, 0-100 knots, 0-200 km/hr
- Accuracy: 1 mph or ± 3%
Wind Direction
- Azimuth accuracy: ± 3°
- Bearings: Bushing
- Potentiometer gap: 5°
- Threshold: 1.2 mph
- Measurement range: 0-360°
Current Loop
- Accuracy: ± 1% full scale
- Output span: 4 to 20 mA, proportioned to 0-100 mph
- Output span: 4 to 20 mA, proportioned to 0-360°
- Supply voltage range: 8 to 30 Vdc
- 2-wire loop interface: Screw terminal block
- Interface power: Derived from current loop
- Circuit time constant: 1 sec
- Temperature range: -58° to 122° F (-50° to 50° C)
Dimensions
- Wind speed and direction: 12" H x 10" W
- Wind speed only: 4.5" H x 8.5" W
- Electronics enclosure size: 4.7" H x 4.7" W x 2.25" D
- Sensor cable length: 40`
- Weight/Shipping: 4 lbs/6 lbs