[talonraid]

I have noticed that my gauges always show about 200 lbs less psi than the pressure gauge at the dive shop. It's not due to a hot tank fill that later cools because I've cross checked it with tanks that have cooled for a few days and with recently filled tanks. The error is the same in both instances.

I assume, but I don't know that this is some sort of safety feature that's just built in to analog gauges, but perhpas it's something that occurs with use and time and can be adjusted or fixed.

If it's a safety feature installed by the manufacturer, I wonder if it can be corrected. I would much rather have my guages read the correct pressure and I will apply the margin for safety, than have the manufacturer pad my safety that I already take into consideration and then the dive boats also pad.

Is this pretty typical of analog gauges or am I off the mark?