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The Vortex Pro-1200 "Plus" anemometer is an affordable way to provide you with accurate wind speed in places where AC power may not be available.


The jack connection and flexible wire make the unit more suitable for mobile use than the standard Pole Mount Anemometer, whose exterior grade wire is more rigid, and which does not include a connector.


You can mount this anemometer to your own pole or roof bracket, bring the wire in through a window or some other hole, and stick the display on the glass, a window, or anywhere you want.


Connect the display and its ready to go.

The Vortex Pro-1200 Plus portable anemometer display is a high quality, Sigma Sport bicycle computer.  Speed range is approximate. 5 to around 150 mph, although the calibration has only been verified from 5 to 50 - we did not find a wind tunnel with 150 mph calibration facilities!  Battery life is around 1,000 hours of continuous use.  Some anemometers have been tested lasted for well over a year on the original batteries!

Technical Specification





3-Cup rotor Reed switch/magnet provides 1 pulse per rotation.






Approximately 6 in (150 mm)






Approximately 3 mph to 125+ mph (~5 kph to over 200 kph)






Anemometer is supplied with an aluminium mounting bracket with 2 holes for screws.

Designed to be mounted on top of a pole or bracket.

Custom brackets available up request (offset, for example)






Standard length is 25 feet (8 m)

Wire can be extended using any 1/8" jack audio cables






LCD Digital Display on anemometer is a Sigma Sport Model BC-1200 bicycle computer.


Dual Display simultaneously shows CURRENT SPEED (top display)plus:


MAX, AVERAGE, KM/MILES, or several other (bicycle-related) functions.


Select mph or km/h (knots too if you wish - see Owners Instructions for details)

Water-resistant (not waterproof).

Provided with high strength self-adhesive Velcro pads for mounting the display






CR2032 Coin Battery located in the display, not the rotor/head.


Battery life 1 to 3 years of intermittent, occasional use.

A few months to a year of continuous use, depending on wind conditions and mode of use

(Display goes to low power mode when the wind speed drops to zero,

or if removed from the bracket when not in use)






Top Anemometer Display (Current Speed): 0.5 mph

Bottom Anemometer Display (Max, Average, etc.): 0.01 mph






Top Anemometer Display (Current Speed): 10 mm (approximate. 1/2")

Bottom Anemometer Display (Max, Average, etc.): 5 mm (approximate. 1/4")






Approximately 1 Hz (1 second)






A few tenths of a mph from 4 to 10 mph


+/-4% from 10 to 50 mph

estimated within 4% above 50 mph

Calibration chart








Since bicyclists do not want their average speed to be diminished when they come to a stop, the computer will only record and average when the wind is blowing.  It stops recording below approximately 1 mph.  That means that if the wind blows for 2 hours at 20 mph and 2 hours at zero, the average shown will be 20, not 10!   Please keep this in mind for your desired use of the Vortex anemometer.


WORKAROUND : If you want to know the real average wind speed - even with spells near zero, do the following:  reset the computer, note the time.  When desired, simply divide the total number of wind "miles" on the display by the number of hours since reset. 


Click on the link below and look for the BC1200 CYCLE COMPUTER for more details on the display: http://www.sigmasport.com/index_usa.html


Inspeed Vortex Pro-1200 Plus Portable Anemometer

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