How about replacing the sensors with closed type like these (lower on the page):
http://www.futurlec.com/Ultrasonic_Sensors.shtml
Ioannis
How about replacing the sensors with closed type like these (lower on the page):
http://www.futurlec.com/Ultrasonic_Sensors.shtml
Ioannis
Thankyou for your suggestion Ioannis.
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