checking the tires testing fuel pump pressure testing fuel pressure regulator testing compression testing the coolant system testing engine oil pressure testing transmission pump pressure
On a manifold gauge set, there are two gauges. The gauge encased in red measures pressure on the high pressure (discharge) side. That's the "high side gauge". The other will be incased in blue, and measures vacuum pressure on the low side.
Connect the pressure gauge to the high pressure port. Discharge your Freon into the low pressure port. Stop the Freon discharge when the Freon engage reaches the appropriate level.
For measuring the flow of hydraulic fluid.
A pressure gauge indicates actual pressure and a differential pressure gauge indicates the difference in pressure.
To measure the wilting point using a pressure gauge, you would slowly decrease the pressure in the soil using the gauge until the plant begins to show signs of wilting. The pressure reading at which this wilting occurs is considered the wilting point. This method helps determine the soil moisture level at which plants start to experience water stress.
A gauge begins with g.
A compound gauge is a pressure gauge that displays both negative and positive gauge pressure measurements. Gauge pressure is a measurement of pressure relative to ambient pressure. For example, if ambient pressure was 14.7 PSI and you were to measure absolute vaccum using a compound gauge, the gauge would indicate -14.7 PSI.
It is certainly not mandatory unless the system it is designed around calls for them, but they certainly are handy and a welcomed if you ever have to troubleshoot the system. I never design a pumping system without having suction and discharge gauges. Of course, on a submersible pump, you would only have a discharge gauge.
The pressure at the discharge side of a forced draft fan is generally higher than the surrounding atmospheric pressure due to the fan's action of pushing air into a system. This pressure level can vary depending on the design of the fan and the requirements of the system it is serving. It is typically measured in inches of water gauge (in wg) or pascals (Pa).
Bourdon's tube pressure gauge cannot be used to measure negative pressure. This is because absolute pressure must be measured and the Bourdon gauge only indicates the gauge pressure.
Gauge pressure usually refers to the pressure difference between ambient, atmospheric pressure and the pressure in a vessel or line. A gauge pressure of zero would mean that the vessel or line was at atmospheric pressure. Normally the pressures of interest are ABOVE atmospheric so the gauge pressure is positive. Vacuum gauge pressure measures how far BELOW atmospheric pressure a vessel or line is. As such vacuum gauge pressure may be measured as a negative number - or for convenience it may be reported as a positive number with the caveat that it is "vacuum gauge pressure", meaning that the reported pressure is how far atmospheric pressure is above the pressure in the vessel or line.