Ammonit
Ammonit
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state of the art measurement equipment for the wind industry
since 1989, marketed in more than 100 countries

Anemometers

Anemometers measure the horizontal wind speed (velocity). This parameter is crucial for any wind site assessment. Cup anemometers are the general standard type of anemometer. They are robust and resistant to turbulence and skew winds caused by masts and traverses. Each anemometer should be individually calibrated and equipped with a certified calibration report according to international standards (e.g. MEASNET). At least two anemometers have to be installed on a met mast. Most anemometers can be equipped with electronically regulated heating.

In order to pool competences in the field of flow measurement and meteorological measurement technology, Ammonit Measurement GmbH and WIND-consult GmbH founded the Ammonit Wind Tunnel GmbH with headquarter in Bargeshagen near Rostock (Germany). Ammonit Wind Tunnel has been accredited by the German accreditation body (DAkkS) as independent calibration laboratory according to DIN EN ISO / IEC 17025. Ammonit Wind Tunnel is member of the MEASNET group. In its own wind tunnel the company calibrates wind speed sensors according to IEC 61400-12-1 and MEASNET for wind energy assessments.

Studies regarding anemometer behaviour

In order to analyse the accuracy of anemometers and define criterias for anemometers which are suitable for wind measurement, the EU has financed three comprehensive studies in which well-known institutes like DTU (formerly Risø) and DEWI took part. The studies SITEPARIDEN, CLASSCUP and ACCUWIND indicate that the following criterias are crutial for anemometers used in wind measurement:

  • Angular response: anemometer behaviour according to variable flow angle
  • Turbulence behaviour: anemometer reaction on changing velocity
  • Bearing friction: influence of temperature on bearing friction

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IEC Classification of Anemometers

The classification describes the uncertainty of an anemometer considering general influencing parameters like turbulence, air temperature, air density and average flow inclination. See tables below (click on Show / hide table) for the classification of commonly used cup anemometers in wind energy assessments. Please note that the classifications have been performed in different wind tunnels from different institutes.

Classification and Accuracy
According to the IEC 61400-12-1 the Operational Standard Uncertainty can be derived from the classification and the wind speed bin. The operational standard uncertainty describes the maximum deviation of the wind speed measured by the anemometer compared with the real wind speed in m/s, whereas the classification is only a number. The operational standard uncertainty is calculated as follows:

IEC-OperationalStandardUncertainty

where Uj  is the wind speed bin; k the classification.

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Anemometer Thies First Class Advanced X

Thies First Class Advanced

Order-No:
S11200 / S11200H (heatable)

Classified according to IEC 61400-12-1
Edition 2.0 (2017-03)

Measurement of horizontal wind speed, absolute and relative air presse, inclination, acceleration as well as vibration.
Automatic correction of measurement values. RS485 output (Modbus).

  • Accurate wind speed measurement:
    Class A = 0.65 (Heating on)
  • Outstanding performance
  • Optimum linearity: r > 0.999 99 (4 … 20 m/s)
  • High turbulence intensity
  • Measuring range: 0.3 ... 75 m/s
  • Resolution: 0.05 m wind run
  • Temperature range: -50 ... 80°C
  • Low start up value
  • High survival speed
  • Minimum overspeeding
  • Low maintenance due to ball bearing cup star
  • Weatherproof (seawater-proof)
  • Heatable

Downloads

Datasheet
ClassificationReport

 

 

Anemometer Thies First Class Advanced II

Thies First Class Advanced

Order-No:
S11101 / S11101H (heatable)

Classified according to IEC 61400-12-1
Edition 2.0 (2017-03)

Extremely low maintenance thanks to low-inertia and ball-bearing cup star with cups made of carbon-fiber-reinforced plastic.

  • Accurate wind speed measurement:
    Class A = 1.8 (Heating on)
  • Outstanding performance
  • Optimum linearity: r > 0.999 99 (4 … 20 m/s)
  • High turbulence intensity
  • Measuring range: 0.3 ... 75 m/s
  • Resolution: 0.05 m wind run
  • Temperature range: -50 ... 80°C
  • Low start up value
  • High survival speed
  • Minimum overspeeding
  • Low maintenance due to ball bearing cup star
  • Weatherproof (seawater-proof)
  • Heatable

Downloads

Datasheet
ClassificationReport

 

 

anemometer Thies First Class Advanced

Thies First Class Advanced

Order-No:
S11100 / S11100H (heatable)

New model Thies First Class Advanced II available
(S11101 / S11101H) with latest IEC classification!

Classified according to: IEC 61400-12-1 (2005-12),
MEASNET, CLASSCUP, ISO 17713-1

According to the ACCUWIND study (testreport1) it is the best sensor on the market!
Extremely low maintenance thanks to low-inertia and ball-bearing cup star with cups made of carbon-fiber-reinforced plastic.

  • Highly accurate anemometer, class: S 0.5 / A 0.9 / B 3.0
  • Outstanding performance
  • Optimum linearity: r > 0.999 99 (4 … 20 m/s)
  • High turbulence intensity
  • Excellent price-value ratio
  • Measuring range: 0.3 ... 75 m/s
  • Resolution: 0.05 m wind run
  • Temperature range: -50 ... 80°C
  • Low start up value
  • High survival speed
  • Minimum overspeeding
  • Low maintenance due to ball bearing cup star
  • Weatherproof (seawater-proof)
  • Heatable

Downloads

Datasheet
ClassificationReport      IEC61400-12-1

 

 

Anemometer Vector

Vector L100 First Class

Order-No:
S14100 / S14100H (heatable)

Classified according to IEC Standards
Optoelectronic wind speed sensor

  • Class: 1 / A 1.8 / B 4.5
  • Measuring range: 0.2 ... 75 m/s
  • Temperature range: -30 ... 70°C
  • Resolution: 0.05 m/s
  • Weight: approx. 0.5 kg
  • Low energy consumption
  • Robust and weatherproof (seawaterproof)

Downloads

Datasheet

anemometer Thies Compact

Thies Compact

Order-No:
S12100H

Opto-electronic wind senor
with low power frequency output signal.
Low maintenance thanks to low-inertia and ball bearing cup star.

  • Measuring range: 0.5 ... 50 m/s
  • Resolution: < 0.1 m/s
  • Temperature range: -30 ... 70 °C
  • Low maintenance due to ball bearing cup star
  • Heatable
  • Not suitable for wind site assessment according to IEC 61400-12-1

Downloads

Datasheet

Anemometer WindSensor (RISØ) P2546A-OPR

Anemometer RISO

Order-No:
S16100C

Classified according to IEC 6140012-1:2005.
Very reliable anemometer

  • Class: 1 / A 1.32 / B 3.71
  • Measuring range: 0 ... 70 m/s
  • Negligible overspeeding
  • Temperature range: -35 ... 60°C
  • Starting speed: < 0.4 m/s
  • Non heatable

Downloads

Datasheet
ClassificationSummary

anemometer Vaisala WAA 252

Vaisala WAA 252

Order-No:
S15100H

Non-freezing all weather sensor
Heatable cups!
Opto-electronic transducer

  • Class: 1
  • Measuring range: 0.4 ... 75 m/s
  • Temperature range: -55 ... 55 °C
  • Starting speed: < 0.5 m/s
  • Good effects in cold (arctic) climatic conditions
  • Heatable (cups included)

Downloads

Datasheet

Propeller Anemometer Young/Gill MODEL 27106T

Young Propeller Anemometer MODEL 27106T

Order-No:
S17100

Measuring of horizontal and vertical wind speed
Not classified according to MEASNET and IEC

  • Measuring range: axial flow 0 ... 40 m/s (90 mph)
  • Measuring range: all angles 0 ... 35 m/s (80 mph)
  • Temperature range: -50 ... 50°C
  • Distance constant: 2.1 m
  • Output signal: 1800 rpm (± 500 mV) = 9.0 m/s (20.1 mph)

Downloads

Datasheet

Further available anemometers

 

Further anemometers are available on request. Please ask our sales team +49-30-6003188-0 or This email address is being protected from spambots. You need JavaScript enabled to view it.

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