Generation of pressure: the force F always has one direction (here: vertical) and is therefore a vector. The pressure p, however, has no direction – it is a scalar. Within a closed system, for example a pressure accumulator, the pressure always acts evenly in a vertical direction across all surface areas. In practice, this means that the installation position of the pressure transmitter and the membrane can be chosen at random. For example, the pressure in the accumulator of a compressor can be measured by installing the pressure transmitter on the upper side of the container with the membrane pointing downwards.
If you load an area of 1 m² with 100 g weight force (F = 0.1 g × 10 m/s² = 1 N), this results in a pressure of 1 Pa.* The commonly used unit for higher pressures in Europe is the Bar (bar). As can be seen in the calculation, the Pascal (Pa) is too small a classification for most technical applications.