Pond Boss Forums AERATION Systems questions Oil Pressure Gauge Question

As stated liquid filled gauges dampen the pulsation. Pulsation can quickly wear out the gear mechanism in the gauge either destroying it or making it inaccurate. More important in hydraulics than air applications (since liquids do not compress, the pulsations from a hydraulic pump are more severe than with a compressible gas).

One thing that will quickly ruin any gauge is letting some moisture get up into the gauge then letting it freeze. The frozen water in the flattened tube that actuates the dial will deform and best case make the gauge fail completely or worst case just cause it to be inaccurate.

A simple check for anyone paranoid about accuracy is to plumb in a Schrader valve (tire valve stem) in line along with the pressure gauge in your air application. They are available with 1/4 male pipe thread one end and the tire type valve on the other. Then any time you want to check the gauge accuracy simply use a low pressure tire gauge (like used for ATV tires) on the Schrader valve.