differentiaaldruksensor

A differentiaaldruksensor, often abbreviated as DP sensor, is a device used to measure the difference in pressure between two points. This difference, known as differential pressure, is a crucial parameter in many industrial and scientific applications. The sensor typically works by exposing two pressure ports to the system. Internal diaphragms or sensing elements react to the applied pressures, and the resulting displacement or deformation is converted into an electrical signal. This signal, which can be in various forms such as voltage, current, or digital output, is proportional to the measured differential pressure.

DP sensors are constructed using a variety of technologies, including piezoresistive, capacitive, and resonant wire sensing. Piezoresistive sensors use strain gauges whose electrical resistance changes under pressure. Capacitive sensors measure the change in capacitance between diaphragms as pressure varies. Resonant wire sensors detect pressure by measuring the change in the resonant frequency of a wire. The choice of technology depends on factors like required accuracy, operating temperature range, and cost.

The applications for differential pressure sensors are diverse. They are widely employed in HVAC systems to monitor airflow and filter status, in process industries for flow measurement (by sensing the pressure drop across an orifice plate or venturi tube), and in medical devices for monitoring fluid levels and respiratory pressures. They also play a role in leak detection and tank level monitoring. Calibration is essential for ensuring the accuracy and reliability of these sensors over time.