Regulators and Pressure Gauges: What You Need to Know
Explanation:
The Role of Pressure Gauges in Regulators
Regulators, particularly those used for scuba tanks or compressed gases, are commonly equipped with two pressure gauges. One gauge displays the tank pressure, providing the user with information about the remaining air supply. The second is often a submersible pressure gauge (SPG) for scuba divers, or in other applications, it could show the working pressure, which is the regulated pressure suitable for the operating equipment.
In contrast, tire pressure gauges and ionization gauges usually have just one gauge, since they serve to measure only one pressure value, either internal tire pressure or the pressure within a vacuum system, respectively.
Gauge Pressure vs. Absolute Pressure
Gauge pressure is the pressure relative to atmospheric pressure. Devices like manometers and barometers are used to measure this kind of pressure. The terms gauge pressure and absolute pressure play a significant role in understanding pressure readings. Absolute pressure is the sum of gauge pressure and atmospheric pressure.
Aneroid Gauge
While an aneroid gauge measures pressure using a mechanical assembly, which may be represented by a single gauge.