Between rooms of different cleanroom classes, pressure differences between 5 and 20 Pa must be ensured from cleaner room to less clean room. The minimal positive pressure of the cleanroom ensures that no air flows back into the cleaner area from the unclean area when doors are opened. The lowest contamination-level cleanroom itself is also accessed via airlocks for personnel and materials, where strong air currents stir up the particles present and extract them via filter systems. According to DIN EN ISO 14644-3, the pressure difference of a cleanroom to the personnel and material airlocks, to any cleanrooms of other purity classes as well as to the surroundings, must be tested. A test of differential pressure at the filter should also be carried out.
Precise measurement of differential pressure
Differential pressure of the cleanroom
Precise measurement of the differential pressure for checking the differential pressure cascade, which ensures the norm-compliant operation of your cleanroom, demands a high level of accuracy of the differential pressure measuring instruments.
Differential pressure at the filter
The reliable determination of the differential pressure at the filter of the air conditioning system allows exact conclusions to be drawn regarding the degree of contamination, and helps you to maintain the continuing function of your air conditioning system.
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