Wind Direction Sensor First class



The wind direction transmitter serves for the detection of the horizontal wind direction
in the field of meteorology and the technology of environmental protection.

Special characteristics:

• High level of measuring accuracy and resolution
• High damping ratio at a small delay distance
• Low starting threshold
• Magnetic coupling, which is free of hysteresis and wear,
situated between the axis of vane and potentiometer.
• Electronic protective circuit for the limiting of current,
and against erroneous connection, with model
4.3151.x0.110 und 4.3151.x0.012
• Easy removal, and mounting when changing the ball bearing

An electronically-regulated heating system has been installed with the wind direction sensor for winter operation in order to prevent the ball-bearing and the external rotation parts from freezing. Power supply for the heating system could be provided for instance by our Power Supply Unit, order-no. 9.3388.00.000.

Mode of operation
The dynamic characteristics of the wind vane is achieved by the aluminum light-weight construction. The co-action of wind vane and balance weight results in a high damping ratio with small delay distance as excellent characteristic of the complete vane.
The axis of the wind vane is running in ball bearings, and is coupled, in contact less magnetic manner, with the axis of the integrated potentiometer. Thus, clearance and friction in the coupling are avoided, and an easy starting is guaranteed.
An AC- or DC-voltage of 24 V is intended for the separate supply of the optional heating. In all probability, the heating guarantees a trouble-free function of the Wind Direction Transmitter First Class even under extreme meteorological icing-conditions.
The outer parts of the instrument are made of corrosion-resistant anodized aluminum, and stainless steel. Highly effective labyrinth gaskets and O-rings protect the sensitive parts inside the instrument against humidity and dust.

with heating
without heating
Digital output: 8 bit thies serial, resolution: 2,5 ° (for Thies datalogger)
Digital output: 10 bit Thies serial, resolution: 0,35°
Digital output: 12 bit serial telegram, RS 458, resolution: 0,01 °
Potentiometer: 0 … 2 k with 50 ohms protection
Potentiometer: 0 … 10k with 50 ohms protection
Potentiometer: 0 … 2k without protection
Potentiometer: 0 … 10k without protection
Analogue output: 0 … 360° ~ 0 … 20 mA
Analogue output: 0 … 360° ~ 4 … 20 mA
Analogue output: 0 … 360° ~ 0 … 10 V

Measuring range 0 … 360 °
Measuring Accuracy 1° (unless 4.3151.xx.001: 0,5°)
Survival speed 85 m/s up to 0,5 h (without damages)
Permissible ambient conditions for operation -50 … +80°C all occurring situations of rel. humidity incl. dew moistening
Electrical output Potentiometer 10 k
An electronic protective circuit avoids an overloading of the potentiometer in case of erroneous connection, and on transition from 0° to 360 °. The protective circuit represents a series resistance of 500 ohms, however it limits the short-circuit-current on transition from 0° to 360 ° (and vice versa) to < 2,5 mA..
Linearity 0,25% (1°)
Starting threshold < 0,5 m/s at 10° amplitude
Delay distance < 1 m (nach ASTM D 53666 – 96)
Damping ratio D > 0,3 (acc. to ASTM D 53666 – 96)
Heating Surface temperature of housing neck > 0 °C at 20 m/s up to –10 °C air temperature, at 10 m/s up to –20 °C, using the Thies icing standard 012002 on the housing neck. Heating regulated with temperature sensor
Electrical supply for Potentiometer Voltage: 4 DC – 42 V DC (galvanic isolation from housing); current: <2,5 mA on transition from 0-360 ° and 360 –0°; series resistance: 500 ohms (representative)
Electrical supply for heating voltage:    24V AC/DC (galvanic isolation from the housing); Capacity:    25 W
Connection 8-pole plug connection for shielded cable in the shaft
Montage Mounting on mast 1“, for ex. DIN 2441 1½ “ with separate adaptor (option)
Weight approx. 0,7 kg
Protection IP 55 (DIN 40050)
Reference number Specification
IEC 61000-6-2: 2005 Electromagnetic compatibility
Immunity for industrial environment
IEC 61000-6-3: 2006 Electromagnetic compatibility
Emission standard for residential, commercial and light industrial environments
IEC 61010-1: 2001 Safety requirements for electrical equipment for measurement, control and laboratory use.
Part 1: General requirements