Differential pressure sensors measure the difference between 2 absolute pressures p1 and p2 in gases, steam, and liquids. Among other applications they can be found in filter monitoring, level measurement in closed containers, and safety-critical systems. They are often referred to as differential pressure transmitters or differential pressure transducers.
Een drukverschilsensor heeft twee procesaansluitingen. De druk werkt in tegengestelde richting op het membraan. Het meetresultaat is altijd het verschil tussen de twee drukken: p2 - p1 = Δp.
A distinction is made between piezoresistive and capacitive measurement. Most differential pressure sensors are now based on the piezoresistive effect (the change in electrical resistance of a material caused by tension or pressure). This effect is achieved by metallic strain gauges, which are glued to the elastic membrane already mentioned, or by silicon wafers.
What are the different types of differential pressure sensors? - JUMO FAQ
Verschildruksensoren komen overal voor waar drukverhoudingen continu moeten worden gemeten en gecontroleerd, bijvoorbeeld bij filterbewaking of flowmeting.
