Il 11-Nov-97, Alberto Smulders scrisse: >Another very interested person here, looking for a cheap method to measure >contents in grain and oil storage bins - should be a kind of ultrasonic >rangefinder, maximum range around 10...12 meters, ruggedized for use in an >industrial environment, some serial communication means for rather long >distance (up to 1 km or so) if possible with unique address for >interrogation, and.... (hmmm... am I asking too much ????) After a standard ultrasonic module has been defined you can even add your own code to drive a fiber optic trasmission systemmm... The main target should be to build that module. -- - *Alex* - (azummo@ita.flashnet.it)