Differential pressure gaugeA pressure gauge commonly used to measure the difference in pressure between two different points. Differential pressure gauges are often used in conjunction with throttling devices (such as orifice plates, Venturi tubes, etc.) to measure fluid flow, in addition to measuring pressure differences. Differential pressure gauges can also be used to measure liquid levels (such as differential pressure level gauges) and resistance (i.e. pressure drop at two points) of pipelines, tower equipment, etc.Has three major characteristics：