[moolight0551]

My understanding is that the "Fine Offset" type of rain sensors are a passive type of sensor. By that I mean there is simply a switch(a reed switch) inside the unit that is closed by a magnet attached to an arm on a tilting bucket which fills and tilts with a certain amount of rain. The bucket tips from side to side continuously emptying itself but operating the switch each time. Two wires are extended to the Tx Unit which sense the closure of the switch and so register a measured amount of rain. I think that any type of rain gauge sensor which operates using this principle could be used, but there would need to be adjustments to the Weatherduino program(s) depending on the amount of rain that is needed to close the switch. This may be difficult to carry out.

Dave