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Differential Pressure Measurement

Differential Pressure Measurement

Differential Pressure Measurement and  Low Differential Pressure Measurement


The most general industrial pressure measuring device is the differential pressure transmitter.  Different pressures act on an oil-filled, pressure difference measuring cell from two sides. The instrument converts the pressure differential into an electronic signal.


Differential pressure measurement is largely used in domestic and industrial applications. Pressure, level, density, temperature, and flow of liquids, suspensions, gases and vapors can be measured using the principle of differential pressure. 


Differential pressure measurements are generally applicable to many flows in most industries, such as mining, mineral processing, pulp and paper, petroleum, chemical, petrochemical, water, and wastewater industries. Some new merging flow measurement technologies may perform better than differential pressure flowmeters in some specified situations, however, differential pressure measurements are still used extensively due to long-standing user familiarity with the technology. Differential pressure transducers can detect differential pressures with a wide range. With an installed flange and diaphragm, media with extreme viscidity can also be safely and reliably measured.


Low differential pressure is based on the technology of diffused silicon pressure sensing, mainly for dry air or gas media. Low differential pressure is measured and monitored where even minor differences in pressure can have a big effect. The fields of use, therefore, range from clean rooms, operating theaters, and laboratories to applications in research, technology, and the heating, ventilation, and air-conditioning (HVAC) industry. LEFOO offers transmitters and clean room panels as well as numerous accessories for the measurement of differential pressure. 

Since the pressure parameters are relative to humidity and temperature, hence the pressure measuring also often needs to be monitored in combination with temperature and humidity.