Hello PF. I'm currently tackling a problem at work that I could use some input on. I am trying to gather data regarding the force applied by a swelling material against the ID of a pipe. The purpose is to determine how the force increases with swell before leveling off, as well as to see how uniform this force is throughout the material. The biggest issue seems to be the environment that the testing is performed in. I need something that will withstand high salinity water heated to 80* C for a prolonged period of time (3 weeks ish.) I've considered using strain gauges placed on the OD of the pipe, but I don't believe the force generated by the swelling material will be large enough to read on a metal pipe. I would need to determine a material that would deform enough for the strain gauge to read as well as withstand the environment. I'm also not sure if strain gauges are designed to be submersed or exposed to salt water. I've considered flexible force sensors attached to the ID wall, but they are not submersible nor designed for salt water. Is there a way to use a piezo material (think quartz tube) to measure this? I'm still an undergrad ME student so my real world engineering experience is limited. Any input is appreciated. Thanks, Chris H.