Differential pressure transducer with scalable measuring range and a high level of overpressure protection. The P 26 differential pressure transducer is designed for pressure monitoring applications in clean rooms, laboratories, pharmaceutical plants and operating theatres as well as for special uses in machine and plant construction. As well as measuring the differential pressure, the instrument also records positive and negative overpressures as well as flow rates or volumetric flows. The measuring range is scalable in the range from 10 .. 100 %. Two optional contact points allow the user to connect visual or audible alarms that are triggered any time values rise above or fall below specified limits. The transducer can be configured easily via an USB interface (option) with software.