> I have two points of confusion: > > 1. You show prices of $25 and $18, but only one part number (KMY 24)? What > is the difference? > > 2. Since the KMY 24 is a Doppler device, it will not recognize an object > that is NOT > in motion, correct? Is this why you are using two devices? > > Thanks for the clarification.... > > Larry Woods > one piece at @ $25 ea. one hundred pieces @ $18 ea. Same part, sorry for the confusion With Doppler, a non moving object will appear as a higher level of DC, but not in proportion, to its size or distance. This device is for motion detection and direction. Gordon Varney