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Using atmospheric pressure as reference is usually signified by a "g" for gauge after the pressure unit, e.g. 70 psig, which means that the pressure measured is the total pressure minus atmospheric pressure. There are two types of gauge reference pressure: vented gauge (vg) and sealed gauge (sg).
For instance, an absolute pressure of 80 kPa may be described as a gauge pressure of −21 kPa (i.e., 21 kPa below an atmospheric pressure of 101 kPa). For example, abdominal decompression is an obstetric procedure during which negative gauge pressure is applied intermittently to a pregnant woman's abdomen. Negative absolute pressures are possible.
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A tire-pressure gauge, or tyre-pressure gauge, is a pressure gauge used to measure the pressure of tires on a vehicle. Proper tire pressure is crucial for vehicle safety, fuel efficiency, and tire longevity. Tire gauges come in various types, including analog, digital, and dial gauges, each offering different features and accuracy levels.
Pressure gauge or vacuum gauge, see pressure measurement; Gauge pressure, pressure above ambient pressure; Stream gauge, for measuring height and discharge of a river or stream; Air core gauge, a type of rotary actuator often used in automotive instruments; Gauger, one who gauges or measures, typically dutiable commodities, such as wine, landed ...
Time pressure gauge technology is relatively new, and not fully in widespread use. However, the software technology it uses is more integrated. A comprehensive oxygen planning program developed by Aeronautical Data Systems Inc. for the airline industry exists and is in use with over 20 corporate flight departments.
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A submersible pressure gauge is used to keep track of the contents of the diver's air tank. Another gauge is used to measure the hydrostatic pressure, usually expressed as a depth of sea water. Either or both gauges may be replaced with electronic variants or a dive computer. [37]