Omega compressor vs. tank guages

[ScubaBrew]

Greetings, just inquiring for opinions on which gauge is typically more accurate, those on the Omega “compressor” or those on the Omega “tank” itself. I have 2 tanks that read similarly (lower observed psi), but not the same as compressor gauge (higher observed psi). Compressor shuts off at 4500psi, though tanks don’t observe a complete 4500psi

Thoughts?

 

[JimNM]

If you have a very narrow air hose, the compressor will reach shut off pressure before the tank does.

 

[dizzums]

the gauge gives you a ballpark so you know where your at with a tank or gun etc .. you dont need to know the scientific exact psi ...

 

[likkitysplyt]

I've had 2 Omega compressors and both were very close to the pressure observed at the tank. However if you are getting any kind of significant difference between the gages I would highly consider going for the lower one. High pressure air DEMANDS that you use the safety card at all times. It has no mercy if it blows ... that includes fittings also.

If you pay attention to your compressor while filling you will find out that it is most likely taking as long to go from 4000 to 4500 psi as it does from 3000 to 4000 psi. That last 500 psi works the heck out of a compressor and it is rough on the orings. For longevity sake on your compressor, it might be a very good idea to cut your fills down to around 4000 psi. Just saying.

Shalom

John

 

[biohazardman]

I think he means if there is a considerable difference go with the higher one so you don't blow a burst disc. I said the same thing a couple weeks ago. If there is not a considerable difference say over 15 or 20 bar I would not worry about it.

It's hard to say which gauge is closer to right. I would just look at several other gauges, compare and get a happy norm on which is closer to fine.

 

[bandg]

I agree with most above (not as much with the 4000 vs. 4500 but that is a valid discussion) but one thing I note from OP is that he notes TWO tank gauges that agree with each other and THOSE read lower than the compressor. Safety is paramount, and there may not be a need to fill higher (debatable) but 2 in agreement (possibly? bigger/more accurate gauges) might suggest that is the "actual" accurate pressure. A test gauge could probably answer all questions.