Pressure sensors?? I think pressure gauges / transmitters cover the whole range of bourdon tube to vibrating quartz crystals to silicon bridge type of sensors?
Not quite sure what you're looking for?
John.
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Do you consider a manometer a gauge? Manometers are still used to a considerable extent in the HVAC industry. Slanting tube manometers can measure very small differences in air pressure, and make up for their inconvenience by their very low cost.
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These pressure guages and transmitters have all sorts of different kinds themselves... which are used in different situations; but as for other instruments that are used to measure pressure there are also pressure controllers. Pressure controllers are valves that work together with the guages and transmitters to control the pressure of the flow.