Inspeed wind sensor, hand held wind meter, anemometer, windsensor, windmeter, and weather instruments for stormchasers and weather enthusiasts


Rugged anemometer with dual digital display handles speeds from 3 mph to over 125 mph. Comes with exterior grade wire. The Pole Mount anemometer is great for home or mobile use where AC power is not available. Pole not included.

Check out the You-Tube Video demo of the Pole Mount Anemometer

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Full Product DescriptionSpecificationsAdditional PhotosOwner's ManualsWarranty Support

Knowing the wind speed is not only useful - it's informative, it's accurate, and it's fun. The Vortex Pole Mount Anemometer is an inexpensive way to provide you with accurate wind speed in places where AC power may not be available.

Mount the head and rotor 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 red & black wires and Voila!

The Vortex Pole Mount Anemometer display is a high quality, Cateye Velo8 bicycle computer (please note!) .  Speed range is approx. 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!  Check out the wind sensor specifications for details.  Battery life is around 1,000 hours of continuous use. Some we have tested on our home lasted for well over a year on the original batteries!

Customer email:
"Thursday morning 103 mph clocked just north of Eufaula, OK on a meso that came almost over head. National weather service advised of wind speeds at 100+ just letting you know it works. Just needed an extra pair of shorts! "
Dave Q.
April 2004

Anemometer wall plaque
Opitional 4"x4" (100mm)
wall plaque (shown with a Sigma Sport Diplay)
Click HERE for details

SENSOR TYPE Anemometer utilizes a 3-Cup rotor.
Reed switch/magnet provide 1 pulse per rotation.
ROTOR DIAMETER approx. 6 in (150 mm)
SPEED RANGE approx. 3 mph to 125+ mph (~5 kph to over 200 kph)
MOUNTING BRACKET Supplied with an aluminum 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)
WIRE Standard length is 25 feet (8m)
Custom lengths available upon request - tested OK to over 1,500 feet
The wire is provided stripped and unterminated

Removable LCD Digital Display is a Cateye Velo8 bicycle computer.
Dual Display simutaneously 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

POWER 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)
SPEED RESOLUTION Top Anemometer Display (Current Speed): 0.5 mph
Bottom Anemometer Display (Max, Average, etc.): 0.01 mph
DIGIT SIZE Top Display (Current Speed): 10mm (approx. 1/2")
Bottom Display (Max, Average, etc.): 5mm (approx. 1/4")
UPDATE RATE Approximately 1Hz (1 second)
ACCURACY 0.5 mph from 4 to 10 mph
+/-4% from 10 to 50 mph
estimated within 4% above 50 mph

A further note on accuracy
We sent an original Vortex anemometer to a certified lab to check its accuracy. The results are shown in the graph below. It can be seen that the Vortex anemometer is within a few percent from about 10 to about 50 mph. From 5 to 10 the readout is the limiting factor, with a resolution of 0.5 mph. Above 50 mph the anemometer still works fine, although we do not have accuracy data in that region. Nevertheless, we believe it to be quite accurate to speeds well over 100 mph.

Vortex Anemometer Calibration Chart
Click for Larger Image

Maximum Speed
The maximum wind speed that can be measured by a Vortex anemometer is over 150 mph (~240 kph). See note below on accuracy.

Minimum Speed
Approx. 3 to 4 mph (~6 kph)

+/-4% from ~10 to ~50 mph
+/- a few tenths of a mph from ~4 to ~10 mph
The accuracy above 50 mph is presumed to be excellent (based on data from the rotor manufacturer), but no precise laboratory calibration has been obtained. 

The Vortex™ anemometer is NOT sensitive to how it is held in the wind, provided the head is held horizontal and the air flow is not obstructed by the user (i.e. you do not have to face into the wind).


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. 

Storm Chasing in Florida...
(click for larger image)

...and monitoring the wind from an RV!

On a rooftop in New Zealand....

Anemometer mounted on a boat
Mount the anemometer on your boat...

Inspeed wind sensor used in Scotland
One of my favorite customer photos
This Vortex Pole Mount lives in Argyll, Scotland

Pole Mount Anemometer at Observatory
Here is a Vortex anemometer watching the stars...
Vortex anemometer used at FIS event in British Columbia
(those little specs are people)

Speed skiing is all about going straight down hills like this, getting to over 100 mph at the bottom. FIS rules mandate cross-winds under 10 mph. Vortex anemometers were used at this FIS-sanctioned event in British Columbia March, 2005.
Garden wind sensor in Florida
This anemometer lives is a beautiful garden
in Pensacola Florida

Vortex anemometer up on a tall pole
Yes, there is a Vortex way up there!



Customer email:
I just wanted to add to the wind speed stories from other users. For the past month my Vortex had clocked max speeds of 85 to 98 mile an hour on the top of my 35 foot sailboat mast. This is all happening in our marina in Yankton, SD. Thankfully the boat was tied off and I was not on it.

Thank you for your photos!

Please keep them coming!



Click here to see the instructions for this anemometer: INSTRUCTIONS

And if you open the box and the anemometer is not what you wanted or expected, return it within 2 weeks in as-new condition for a 100% refund (sorry - not including shipping!).

Basically - our goal is to have your complete satisfaction.