The Sycomoreen's OPALE plants are equipped with ultrasonic repelling devices 2 x 130 dB in order to protect the electric wire from the attacks of rodents and other pest animals.

In order to strongly reject the pest animals, these devices are modulating the waves inside a range of frequencies which are pulsed and variable ; moreover the devices are supplied with an intermittent and cyclic manner : stop during about 8 minutes and continuous restart of about 8 minutes. Thus, the rodents are top stressed without acquiring a familiarization with the ultrasonic emissions. The power of each device is 2W and its annual consumption is about 9 kWh (less than 1€ in France).

More information on http://sycomoreen.free.fr