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Windspeed Ltd (Vector Instruments), 113 Marsh Road, RHYL, N. Wales, LL18 2AB, United Kingdom.
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 Saturday, June 15 2024  Home [arrow]  Products [arrow]  Anemometers [arrow]  A100 (Porton™) Search site:  

Latest Weather...
(Rhyl, N.Wales, UK)
Wind Speed:  6.8 mph
Wind Direction:  353 °
Air Temp.:  14.1 °C
Rel. Humidity:  77.2 %
Rain (last Hr):  0.0 mm
(updated at: 14:57 UTC)

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Celebrating more than 50 years manufacturing & servicing High Quality Vector Instruments Anemometers and Windvanes at Windspeed Ltd
A100 and A100H Porton™ Anemometers
Datasheet: login to download Note: The A100 and A100H Porton anemometers are RETIRED - these models are discontinued, and are only available as spares for existing installations...

-->> Please consider our A100L2/E or A100L2/H anemometer models (which have a similar functionality/output-signal) as alternatives/replacements.

The Porton™ Anemometer is a highly sensitive but robust transducer in which the rotational speed of a 3-cup rotor is measured by means of a photo-electronic pulse generator and ratemeter. An analogue d.c. voltage output is obtained which is substantially linear with respect to windspeed allowing accurate averaging of windspeed data.

The standard range A100 instrument gives 0..10v for 0..100Knots, the high range A100H instrument gives 0..7.5v for 0..75m/s. For low windspeed use, variants are available giving increased output voltages.

All rotors are supplied with individual calibration data traceable to national standards, and the low torque offered by the precision ball-race mounted shaft ensures a low thresholdspeed (0.15m/s) and good repeatability.

The small size and light weight of the A100 series anemometers together with the unique gravity sensitive fastener for the rotor facilitates use in portable applications.

These instruments also feature a remote calibration system.

Construction is from anodised aluminium alloys, stainless steels and weather resisting plastics for exposed parts. Precision corrosion resistant ball-races and a stainless steel shaft enable the R30 rotor response to produce a highly sensitive yet robust instrument suitable for continuous exposure to the weather.

Options for this anemometer include:
  • /PC3 Anti-Surge protection
  • /HE-4 Internal Anti-Icing Heater
  • /HE-1 & /HE-2 External/Retrofit Anti-Icing Heaters
  • /WR Marine Version

  • Note: /WR, /HE-1 and /HE-2 are not recommended for high precision applications.
    The recommended mounting adaptors for use with this instrument are our type 405 and 405-1 series.

    Specification Highlights:

  • Threshold:
  • 0.15m/s (0.3Kt)
  • Starting Speed:
  • 0.2m/s (0.4Kt)
  • Stopping Speed:
  • 0.1m/s (0.2Kt)
  • Maximum Windspeed:
  • over 75m/s (146Kts)
  • Temperature Range:
  • -50 to +70 °C
  • Accuracy (Pulse O/P):
  • 1% of reading (10..55m/s), 0.1m/s (0.1m/s..10m/s)
  • Linearity (Pulse O/P):
  • 0.7% FRO (10..55m/s)
  • Distance Constant:
  • 2.3m +/-10% (R30 rotor)
  • Accuracy (Analog O/P):
  • 1% FRO (10..55m/s, cosnt. temp/supply voltage using cal facility).
  • Supply Voltage:
  • 10..30V DC (max 30mA, typically less than 15mA, see note below)
  • Analog Output Signal:
  • 0 to 10V = 0 to 100Kts (A100), 0 to 7.5V = 0 to 75m/s (A100H)
  • Pulse Output Signal:
  • 0V / 7.5V, at 10Hz per Knot (A100) or 10Hz per m/s (A100H)
  • Rotor:
  • 3-cup R30 type (standard)
  • Dimensions:
  • This instrument is constructed using our standard rotor and anemometer body design and dimensions.

    This product is NOT recommended for new applications .
    Supply Voltage: Units manufactured before 1995 could only operate from 10 to 16V DC and consumed upto 30mA at 12v supply. Contact us for more info.
  • Obtaining best accuracy
  • Reliability & Safety
  • Specifications are correct at time of writing and may change without notice. Please contact us to confirm the latest specifications.
    Please call/email us if you would like access to additional product information, data and specification sheets for this product.
    Windspeed Ltd (Vector Instruments)
    Windspeed Limited (trading as Vector Instruments),
    113 Marsh Road, RHYL, North Wales, LL18 2AB, United Kingdom
    Tel: +44 (0) 1745 350700
    Website design and content is copyright (c) 2003-2024 Windspeed Limited (unless otherise stated). All trademarks are acknowledged.