Differentialdrucksensoren

Differentialdrucksensoren, often abbreviated as DP sensors, are devices designed to measure the difference between two pressures. They are fundamental components in many industrial and scientific applications where precise pressure monitoring is crucial. The core principle of operation for most differential pressure sensors involves a diaphragm that deflects when subjected to a pressure difference. This deflection is then translated into an electrical signal, typically a voltage or current, proportional to the pressure difference. Various sensing technologies exist, including piezoresistive, capacitive, and strain gauge methods, each offering different levels of accuracy, sensitivity, and operating ranges. Piezoresistive sensors utilize changes in the electrical resistance of semiconductor materials under strain, while capacitive sensors measure the change in capacitance between two plates separated by a diaphragm. Strain gauge sensors employ resistive elements bonded to a diaphragm that change resistance as the diaphragm deforms. Differential pressure sensors find widespread use in HVAC systems for monitoring airflow, in medical devices for blood pressure measurement, and in process control for flow measurement of liquids and gases. They are also employed in filter monitoring to detect clogging and in level measurement of tanks. The selection of a specific DP sensor depends on factors such as the required accuracy, the pressure range to be measured, the fluid properties, and the environmental conditions.