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Etesian Technologies BreezeSonic is the world's first self-powered audible alarm anemometer. By virtue of its internal self-contained generator no batteries are necessary.  If the wind is blowing and exceeds 25 mph (8.9 m/s) a 2.9 KHz, 92 dB audible alarm warns of unsafe wind conditions. The internal generator provides all necessary power. No on/off switch. Never a dead battery to replace.


Intended specifically for Aerial Work Platforms

Emits 92 decibel audible alarm at 25 MPH, warning operators to halt work

Self-powered by the wind utilizing an internal generator

No Batteries to replace - No on/off switch


Weight: 10 oz.

Mounting: 13 mm (0.5 in) diameter mast with cotter pin and mast set screw.

Overall height – 20.3 cm (8.0)

Main housing diameter – 6.1 cm (2.39 in)

Power Requirements:      None, self powered

Conical cups measure 63.5 mm (2.5 inches) in diameter

Rotor diameter is 203 mm (8.0 inches)

Fully hardened beryllium-copper shaft running in self-lubricating modified fluoropolymer bearings

Rated bearing PV (pressure-velocity) factor is 20,000 – At 15 mph PV is approx. 500. –  At 100 mph PV is approx. 2,000.

Accuracy: within ±0.5 m/s (±1 mph) for the range 5 m/s to 25 m/s (11 mph to 55 mph)

Alarm/Control:      Set at factory to 25 MPH (11.2 m/s), customization upon request

Alarm Output: Frequency: 2900 ± 250 Hz

Typical Sound Pressure Minimum 92 ± 5 dB(A) at 2 feet (61 cm)


Rail clamp and 3 foot mast