Is Pressure guage important?

[catnip]

Just FYI, the stainless steel gauge I mentioned in my post above is liquid filled (with glycerin), so it may be less susceptible to freezing. In addition the wetted parts are 316SS alloy which is reasonably resistant to corrosive environments including salt water, particularly with the level of CH we typically see in pools with the calcium providing a layer of corrosion protection for the metal. I'll try to remember to provide some reliability feedback after a year has passed.

[sevver]

Our hydrostatic pumps that we used to use to test watermain for leaks used glycerin filled guages, we tested watermain whenever we put it in, summer, winter, whatever. The pump sat in the back of the truck, sometimes for days at a time, in even below zero actual temps. The guage remains fine. My only recommendation is that they sell guages that go up super high, while it will still work, you won't get the accuracy of one that only goes up to say 30 pounds, the increments are larger and easier to see. Grainger would have them for sure, or even any good plumbing supply. And yes, you can walk in off the street, and wave cash around, and they will sell to you.

[Poconos]

Thanks for the info guys. Been trying to think of a way to keep water out of solid state pressure transducers and an inert liquid on the transducer side seperated from the water side by a non-permeable membrane may be the trick. Part of a pump control circuit to protect against over and under pressure. Been in the thinking stage for a couple years. All related to my paranoia of running a pump on a timer and unattended.
Al