For measuring very small pressure differences with CASSY (524 013, 524 006, 524 018, 524 005W2) or the universal measuring instruments (531 835, 531 836, 531 837), e.g. at flow experiments in the wind tunnel (373 12) or the Venturi tube (from 373 091). Connection to the experiment via two hose nozzles (4 mm diam.). Incl. PVC tubing (667 192) and two connectors with nipple (604 520).
