On 01/30/2012 08:50 AM, Carl Denk wrote: > I have 200' to a natural gas well with one 3/4" conduit for heating the=20 > enclosure. I wanted to add communications to a PIC for pressure and=20 > temperature readings. It was felt to run any communications wired cable=20 > in the same conduit would result in crosstalk and garbage messages. I=20 > settled on 62.5/125 um fibe optic which has been working great for 6=20 > years. Today I probably would do it with X-10. >=20 > This is an overkill for the application below, but running signal and=20 > power close together is a concern and needs investigation before=20 > committing to the work. Have you considered X-10 and it's successors? =20 > Checkout Smarthome.com 200' with X-10 ? Not sure you've really used X10. It's not really a trustworthy protocol. IMO, if RS485 would fail in the env., then X-10 wouldn't stand a chance. --=20 Linux Home Automation Neil Cherry ncherry@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .