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April 10, 2008
One of our customers wanted a pre-packaged system that would work easily at distances to 300 feet and beyond. We were up to the challenge. The sensor has been refined over a period of years and really doesn't leave us much room for improvement easily. Adding a hi gain directional antenna to it is possible but doesn't seem very elegant. Instead, why not add an antenna and preamplifier to the receiver, on the ground, where it's a bit easier to work with? And that is exactly what we did.
Apologies are in order for the less than spectacular pictures. But its tough to get a good photo when the sensor and receiver are 325 feet apart. That's right, 325 ft and still going strong. (We ran out of space in our field test!) Below is a picture of the sensor at the far end of the field temporarily proped up on a folding table and barrel.
Below is a photo of our quick and dirty setup. We tossed the antenna, preamp and receiver on a card table along with our oldest laptop to log the results. No dropouts over several hours operation.
If you squint and use your imagination you can see the sensor 300+ feet down field.July 31, 2007
Pieperpower Electrical has installed a wind turbine near Milwaukee, Wisconson. They choose the breeze for their anemometry requirements. They graciously sent us a few photos of the installation.
breeze, on its boom, just before installation
Mounting the boom - no wires !
Nice picture of the turbine
July, 2007
We have repackaged our receiver. Not only is it much more attractive, the display is now protected by a clear polycarbonate cover.
Front view
Connector ViewFebruary, 2007
Etesian has become a reseller of the cups tradionally used by the wind industry in the US. You can purchase these directly from us in addition to our own wireless sensos. Best of all. we now use the impeller from the industry standard anemometer on the breeze.
October 15, 2006
Sensor Magazine featured our anemometer in their September issue. You can see their online coverage at
September 18, 2006
The Users Manual has been added to the Downloads Page. This manual has information concerning the theory, setup and operation of the sensor and companion receiver. We hope you fine it useful. If you have unanswered questions, send them to us at support@etesian-tech.com.
September 7, 2006
Look for upcoming coverage of our systems in three print technical publications. Sensor Magazine and North American Windpower Monthly will have product notices in their September issues. Later this year or at the beginning of 2007, Sail Magazine will have information in their publication, most likely in the January 2007 edition.
September 1, 2006
A potential client asked if our sensor would operate down to minus 40 degrees C. The transmitter data sheet only guaranteed operation to -20 C. Generally speaking, manufacturers are conservative in their temperature specs, so we decided to test the sensor in an environmental chamber. Initially we thought to test just the electronics by supplying a small AC voltage to the electronics, as the self contained generator does. But then we had a better idea. We put a small boxer fan in the test chamber to provide a breeze to run the anemometer. Figure 1 below shows the setup in the chamber. The boxer fan provided enough wind flow to run the cups at approximately 6 MPH. (Note that this photo was taken just at the completion of the test. You can see frost forming on the anemometer and fan as the humid room air comes in contact with the cold anemometer.
Figure 1 - View of the setup inside the environmental chamber We started testing at room temperature, and initially dropped the chamber temperature to 0 deg. C. At each step we would allow the sensor to "soak" at the set temperature for 15 minutes. The testing proceeded "ramp and soak" : -10, -20, -30, -40, -50, -60. We were suprised and delighted! The anemometer was still broadcasting, even down to -60 deg C.
Figure 2 below is the temperature display on the closed chamber door.
Figure 2 - End of testing at -61 Degrees C. August 2, 2006
Etesian Technologies will be shut down from August 10th to August 19th. We will be unavailable to return telephoneand email during this time. We
sincerely hope this does not inconvenience anyone.
