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Wind

Anemometer to measure the wind speed and the wind direction

Wind Speed Sensor

TF4034

For transmission of electrically measured wind speed values. Low-inertia 3-cup  assembly as sensing element; shaft made of stainless steel, guided in special  covered precision ball bearings; housing made of polycarbonate.

The wind speed sensor type 4034 serves for transmission of electrically measured values of the wind speed. It is designed for applications in meteorology and environmental protection, e.g. automatic weather stations, at airports, on research vessels, at industrial sites, for mobile measuring systems etc.. Thanks to various simultaneously usable outputs it is suitable for a wide range of measuring tasks.

The reflecting wheel, made of special plated aluminium, is equipped with 15 black segments. During rotation these segments pass the light barrier and create a sequence of reflection and absorption pulses, in a frequency proportional to the wind speed. Due to precise adjustment of the cup assembly radius there is an exact relation between rotational speed and windrun; the corresponding wind- run to one rotation is 1.5 m. As there are 15 segments on the rotating wheel a resolution of 1.5/15 = 0.1 m windrun results and the corresponding frequency output to a measuring range 0...60 m/s is 0...600 Hz. The subsequent electronic circuitry converts this signal to a digital output, resp. further analog outputs (refer to "Technical Specifications").

The sensor is also available with DC measuring generator which produces a voltage proportional to  the wind speed. Suitable for up to 4 analog instruments, connected in line. 

  • Technical Specification
  • Variations
  • TYPE 4034:
  • Measuring range: 0...60 m/s = 0...116.7 kn
  • Starting threshold: approx. 0.3 m/s
  • Response length: at v = 5 m/s: < 2.5 m
  • Accuracy: +/- 0.5 m/s;
    from 10 m/s 2% of range
  • Supply: Electronics:
    4034.0000: 10…30 VDC; <5 mA at 12 V
    4034.1000: 10…30 VDC; 25…65 mA at 12 V

    Heating:
    10...30 VDC, approx. 7 W
  • Output: Digital:
    0...60 m/s = 0...600 Hz, Open Collector

    Analogue (4034.1XXX only):
    0...60 m/s = 0...1 V / 0...20 mA / 4...20 mA
  • Admissible load: approx. 400 Ω
  • Heating: controlled by thermostat, max. 7 W
  • Weight: approx. 0.5 kg
  • :
  • TYPE 4021 (with DC generator):
  • Measuring range: 0...41 m/s ≙ 0...80 kn
  • Starting threshold: approx. 0.8 m/s
  • Response length: at v = 3 m/s: approx. 5 m
  • Accuracy: +/- 0.3 m/s,
    at v > 15 m/s 2% of range
  • Output: 0…1 mA at Ra = 4 kΩ
  • Heating: controlled by thermostat, max. 6 W
  • Supply: Version with heating only (4021.1XXX ):
    12 VDC, approx. 6 W
  • Weight: approx. 0.9 Kg
  • :
  • GENERAL:
  • Max. load: 60 m/s
  • Admissible ambient temperature: -35...+80°C
  • Protection class: IP65, when operated upright
  • Housing material: Polycarbonate, black
  • Connection: 12 p., plug and socket, water and dust proof acc. to IP67
  • Dimensions: length: approx. 327 mm
    cup assembly Ø: 224 mm
    max. housing Ø: 80mm
    pivot: Ø 34 x 40 mm
  • note 4021.0000Output 0...1 mA at 4 kOhm load
  • note 4021.1000Output 0...1 mA at 4 kOhm load; with built-in heating
  • note 4034.0000Frequency output 0...600 Hz, Open Collector; with built-in heating
  • note 4034.1000Frequency output 0...600 Hz, Open Collector, analogue outputs 0...20 mA / 4...20mA / 0...1 V; with built-in heating
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Wind Speed Sensor

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P403441221