Wind Vane Thies Compact TMR

Wind Vane Thies Compact TMR

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  • TMR wind direction sensor
  • Output: 10-bit serial-synchronous (compatible with Ammonit Meteo-40 data loggers)
  • Measurement range 0 ... 360°
  • Accuracy ±1°

The wind direction is detected by a low-inertia wind vane. The axis of the wind vane is running in ball bearings and carries a diametrically magnetized magnet at the inner end.

The angle position of the axis is canned contact-free by a magnetic angle sensor, (TMR = Tunnel Magneto Resistance) which gives two sinus- and cosinus-dependent voltages as output signal.

A connected micro-controller calculates from this voltages the wind direction in 1024 sectors (0.35°/sector). Related to sector 1 is the wind direction 0°-35°, sector 1024 corresponds to the wind direction 359.65°-360°.

Characteristic Description / Value
Measurement principle Magnetic
Measurement range 0 ... 360°
Accuracy ± 1°
Resolution 0.35°
Starting threshold < 1 m/s           according to ASTM-Standards D5366-96
< 0.4 m/s        according to VDI-Standard 3786 Part 2
Output 10-bit serial-synchronous (compatible with Ammonit Meteo-40 data loggers)
Survival speed max. 80 m/s, 30 min
Operating voltage 3.3 ... 30 VDC / 24 VAC
Operating voltage heating 24 V DC/AC, max. 20 W
Current Consumption @ 12 V DC 1 mA (without heating)
Ambient temperature -40 ... +70 °C
Connection 7-pole plug
Material Aluminum, stainless steel and plastic (Housing and wind vane)
Type of ball bearings Metallic ball bearings
Weight approx. 0.4 kg
Protection IP 55
Manufacturer Thies


Sensor Plug Pin No. Ammonit Cable
Wire Color*
Meteo-40 Digital Supply
Wind Direction Data 3 white IN  
Clock 4 blue CLK  
Supply 1 red   12 V
Ground 2 black   Main Ground
Heating 5 orange,
  24 V AC/DC
6 violet,

Cable type without heating:      LiYCY 4 x 0.25 mm²
Cable type with heating wires: LiYCY 8 x 0.25 mm²
Connect the shield logger-sided to Ground (GND)