Measure Differential Pressure

We have been developing and manufacturing differential pressure transmitters for the HVAC, clean room and industrial sectors at our site in Kirchzarten for over 35 years. Whether filter monitoring, volume flow measurement or clean room monitoring - with our pressure transmitters you will always find a suitable solution for your application. And if you have special requirements, we will also be happy to develop a customized transmitter for you.

The base BDP differential pressure transmitter was developed for cost-sensitive applications in building automation, filter monitoring, and airflow control. With its compact and sleek housing, it combines the functions required for most typical applications, offering an attractive price-performance ratio. The compact design facilitates quick and easy installation, ensuring the device is operational in no time. A display for showing the measured value is available as an option. Depending on requirements, the base BDP is available in two variants: base BDP Switch and base BDP Flex. Both variants are based on the same product platform but differ in their configuration and application logic.

In a mature dandelion flower, the smallest pressure differences are enough to send its umbrellas on a kilometer-long journey. For a human being, this breeze is hardly noticeable - but it is for our differential pressure measurement technology. Differential pressure measurement determines the pressure difference between two pressure potentials. The measurement technology is mostly used in ventilation systems, clean rooms or on filter systems. For example, volume flow can be measured, the overpressure of a system or the degree of filter contamination can be precisely determined.

The detection of differential pressures in the low-pressure range is used wherever the precise determination of the smallest pressure differences has a significant influence on process reliability. In industry, for example, differential pressures are measured to monitor filters or to measure filling levels. In the field of building automation, differential pressure measurement technology is used to determine and control the volume flow in a ventilation duct. In clean rooms or operating rooms, the measuring systems are used to control and monitor the minimum overpressures that protect critical areas from contamination with dirt particles.

To measure differential pressures, two system pressures are measured and the difference between their values is determined. A differential pressure transmitter therefore consists of a system with two pressure connections, a measuring element and measuring electronics. The measuring element is usually a piezoresistive differential pressure sensor with a silicon-based measuring diaphragm. As the differential pressure changes, the measuring diaphragm expands in one direction or the other, thus changing its electrical properties. This change is passed on via an interface to the measuring electronics, which process the signal further and convert it into a standardized analog or digital output signal.