A100R Switching Anemometer
First Class performance to IEC61400-12-1 standard.
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported

Overview

The A100R anemometer is a precision instrument which is easily interfaced with Campbell Scientific dataloggers to give accurate measurements of wind run or mean wind speed. Read More

Benefits and Features

  • Robust, precision instrument
  • Field-proven track record
  • Long cables and anti-icing heaters available to special order

Technical Description

A magnet turns with the rotor spindle producing a varying field which causes a mercury wetted reed switch to make and break contact once per revolution of the rotor. The contacts are bounce free, and no power is required apart from that necessary to detect contact closure; the A100R is thus well suited for use on remote sites. The rotor is tested by comparison with a rotor calibrated at the UK National Physical Laboratory, and a calibration figure is provided with each instrument. The anemometer is constructed from anodised aluminium alloy, stainless steels and weather resisting plastics. A stainless steel shaft runs in two precision,corrosion-resistant ball-races. The bearings are protected from the entry of moisture droplets and dust, resulting in an instrument suitable for permanent exposure to the weather. In the marine version — A100R/WR, available to special order — a touching shaft-seal is fitted for extra protection in place of the standard non-contact seal; please note that this gives a small increase in the threshold or stalling speed.

Images

Specifications

Stalling Speed: 0.2 ms-1 (0.6 ms-1 A100R/WR*) Max. Speed: >75 ms-1 Accuracy: ±0.1 ms-1 (0.3-10 ms-1 [0.7-10 ms-1 for A100R/WR]); ±1% (10-55 ms-1 ); ±2% (>55 ms-1 ) Distance Constant: 2.3 m Calibration: 0.80 revolutions per metre (1 pulse per 1.25 metres) Switch Life: Rated 25 x 109 operations minimum (>20 years) Size: Height 200 mm, case diameter 55 mm, attached screened cable 3 m Rotor: Standard 150 mm diameter 3-cup rotor Weight: 350 g including standard cable Materials: Anodised aluminium, stainless steels and ABS plastics for all exposed parts Rotor Fixing: Patented gravity sensitive fastener for rapid attachment and release Anemometer Fixing: Standard tripod screw (0.25" BSW/UNC), taper adaptor also available. Note that mounting must be within 15° of vertical. Switching Voltage: 100V DC max. Switching Current: 40 mA max. Switch Rating: 4W max. (DC resistive) Duty Cycle: 50%±5% up to 50 ms-1 (±10% up to 75 ms-1) Impedance: 120Ω series resistor plus 10 nf capacitor across line for interference suppression Actuating Time: 1.5 ms Switch Bounce: NIL Min. Current: NIL (life not reduced by use in dry circuits)

Resources and Links

Privacy Policy Update

We've updated our privacy policy.  Learn More

Cookie Consent

Update your cookie preferences.  Update Cookie Preferences