The technological development of gas pressure gauges has shown a trend of evolution from mechanical to digital and intelligent. Early gas pressure gauges were mainly mechanical pointer types, using elastic elements as sensing elements to measure and indicate pressures higher than ambient pressure. Due to the high mechanical strength and ease of production of the elastic sensing elements, mechanical pressure gauges were widely used.
With technological advancements, electronic pressure sensors have been introduced into gas gauges to collect gas pressure signals and implement pressure correction functions. This corrects the accumulated pressure under operating conditions to the accumulated pressure under standard conditions, thereby improving the accuracy of measurement.