Hey everyone, I need to get another ultrasonic range finder because the one I have now lacks the distance I need it to work. Any range finder over about 5m is all I need but Ive been looking at a couple from Devantech specifically the differences between the Devantech SRF08 High Performance Ultrasonic Range Finder and the SRF02 which is a single transducer model. My first question is: What if any advantages are there to having 2 transducers as opposed to one that sends and receives? Secondly both of them are rated for about 6 meters and there short range abilities are somewhat comparable, they both have a fully timed on board echo system, but the SRF08 is about $37 more than the SRF02, does anyone know if there is any real advantage to buying the much more expensive SRF08? (besides the fact that it can like count 16 different objects as opposed to just the first one).