please help me and tell me why my filter pressure rises after only 2 days

For very low pressures, a gauge that uses total vacuum as the zero point reference must be used, giving pressure reading as an absolute pressure. However, anything greater than total vacuum is technically a form of pressure. Most gauges measure pressure relative to atmospheric pressure as the zero point, so this form of reading is simply referred to as 'gauge pressure'. The widely used Bourdon gauge is a mechanical device, which both measures and indicates and is probably the best known type of gauge.Ī vacuum gauge is used to measure pressures lower than the ambient atmospheric pressure, which is set as the zero point, in negative values (for instance, −1 bar or −760 mmHg equals total vacuum). Instruments used to measure and display pressure mechanically are called pressure gauges, vacuum gauges or compound gauges (vacuum & pressure). Many techniques have been developed for the measurement of pressure and vacuum. Pressure is typically measured in units of force per unit of surface area. Pressure measurement is the measurement of an applied force by a fluid ( liquid or gas) on a surface. Example of the widely used Bourdon pressure gauge Checking tire pressure with a spring and piston tire-pressure gauge For tactile pressure sensors, see Tactile sensor. This article is about sensing gas or fluid pressure measurement.

Please help me and tell me why my filter pressure rises after only 2 days