MODEL
WS 102
DATASHEET
Introduction
Wind Speed Sensor is designed with rugged components stand up to hurricane‐force wind yet is sensitive to a light
breeze. It includes sealed bearings for long life. The range and accuracy specifications have been verified in wind‐tunnel
tests. In areas where icing of the anemometer is a problem, drip rings deflect water from the joint between moving
parts.
Theory of Operation
The sensor’s cup assembly consists of three cups mounted on a cup assembly hub. A shaft, which rotates on precision‐
sealed ball bearings, connects the cup assembly to a magnet assembly. When the shaft is rotated, the turning magnet
assembly causes a reed switch to close. It closes twice for every rotation of the shaft. The pulses produced by this
closure is counted by the connected electronics.
Specifications
Sensor Type
Three cups
Material
Control Head UV‐resistant ABS
Wind Cups
Polycarbonate
Range
0 to 250 km/hr
Startup wind speed
0.5 m/s or 1.8 km/hr
Accuracy
± 3%
Output
A, B, C, D are 4 different models
A.
0 – 5 VDC
B.
4 – 20 mA
C.
MODBUS RTU‐RS485
D.
Pulse, 62 Hz = 250 km/hr
Dimensions
3 cup dia. 15 cm
Operating Temperature
‐ 40 ~ 75 ° C
Potential lead
Two wire
Sensor Cable Length
2m
Wiring Diagram
I/O Specifications for 0-5V Sensor Output