How about some sort of airbag that is placed in between the two surfaces. put a tube from it to the pressure sensor, and you should be able to measure the pressure, right? Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams "Michael A. Powers" wrote: > I have an application that requires the use of a mechanical force transducer. Basically, I want to know the force that one flat surface imparts upon another. Does anyone know of a cheap sensor that can be bought (or easily made) that is appropriate? I saw some pressure sensors in Jameco's catalog, but they appeared to be gas pressure sensors and wouldn't be applicable here, or would they? -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads