A mechanical pressure gauge will be able to measure a range of pressures based on your needs. It's not only positive pressure either. There are standards for gauges that can measure both negative pressure and positive pressure, also referred to as a gauge having an asymmetric range or scale.
A cluster gauge that has the vacuum range is able to measure only negative pressure. There are gauges that are only measuring positive pressure. In general, these include atmospheric pressure that is one point on the dial, which is often known as the gauge. There are times when there are demands for gauges using absolute zero as their pressure point. These are known by the term absolute gauges.
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If you're not choosing the proper type of pressure that you want to measure, which is the positive gauge pressure absolute pressure, negative pressure, also known as vacuum, the gauge may not come with the necessary "readable" measurement scale for pressure.
Gauge Pressure – A positive pressure that is greater than barometric or atmospheric pressure, using the ambient pressure as a base. Vacuum – A negative pressure lower than atmospheric pressure or barometric pressure, using ambient pressure as the standard. You can also search online to get more information about gauge.