Air Compressor Gauges
⅛”; ¼”; ½” Rear entry and bottom entry gauges, various sizes and ranges in plastic, steel as well as stainless steel casings available in dry as well as oil filled.
How to read pressure gauges:
Most pressure gauges work on a Bourdon Tube principle. This is an oval hollow tube bend just short of a full circle. When pressure is put inside this tube, the tube tries to straighten itself. While moving it pulls a needle and the needle shows the reading of the pressure or the vacuum. When you select a pressure gauge, the diameter of the gauge will be determined by the distance from where you want to take a reading, but the most important is your normal working pressure.
Airpower always tries to have the normal working pressure, as close as possible to the middle of the scale. The gauge is the most accurate in the middle and the gauge will indicate if the pressure is too low or too high. Pressure gauges measure the difference between the pressure in the line and the atmospheric pressure. This is why it is called gauge pressure. If you want the absolute pressure, you must add the atmospheric pressure to the gauge pressure reading. Gauges are instruments and if not handled with care, you will not get an accurate reading.
Types of Air Compressor Gauges:
If the pressure is stable and very few vibrations on the gauge, you can use a dry gauge, but if the pressure fluctuates or the gauge vibrates, you should use a glycerine or oil-filled gauge. A steel or stainless steel case gauge is better than a plastic case gauge, but also more expensive.