yes, some of them should be the right kind, just usually selles have no idea if their sensor is a continuous-signal sensor or just a pressure switch. Here you can see there is "switch" mentioned at several items, and just sensor at others, while they look about the same. At car parts store they know only what car the particular sensor is mentioned for, but have no idea if it's a switch or what. On Wed, Jun 13, 2012 at 4:32 PM, Electron wrote: > > Maybe some of these will help: > http://www.ebay.com/sch/i.html?_sacat=3D0&_nkw=3Doil%20sensor%20pressure&= _sop=3D15 > > Cheers, > Mario > > > At 10.57 2012.06.13, you wrote: >>Hi, >> >>I'm constantly having trouble with pressure switch of a water pump, >>which is supplying water from a well for a house and garden. Setup is >>far from optimal, and seems like normal, membrane-activated switches >>are having trouble with this. I am sure there are better switches >>available somewhere, but I had an idea to build one by myself, using a >>PIC. That way I could have better control of ON and OFF pressures, and >>hysteresis, probably also some kind of dynamic self-adjusting, to cope >>with completely different situations of supplying just home, vs >>supplying water for garden. Soft start of a pump motor could be >>implemented easily too. >> >>Any ideas what cheap pressure sensor could be used? Sensor has a >>direct contact with water. >>Some kind of a digital output would be best, but i can live with >>analog signal too. >>Best if that sensor is widely available, that is, used in some >>consumer equipment. >> >>Somebody recommended to use oil pressure sensor from a car, that has >>continuous-signal sensor, not just a pressure switch, but I do not >>have an exact car model that uses this kind of sensor. >>Probably sensor, designed to contact with oil, would not live very >>long with water, but it's ok to replace it sometimes if it's cheap >>enough. >> >>I'm interested in pressures between 1 and 6 bar, or so. >> >>-- >>KPL >>-- >>http://www.piclist.com PIC/SX FAQ & list archive >>View/change your membership options at >>http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 KPL --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .