Device for determination of fluid density has a piezo-electric oscillator crystal that is in contact with the fluid being measured via an open porous layer placed in contact with it into which the fluid is poured

摘要

Device comprises a piezo-electric type oscillator (1) that is covered with an open porous layer (4) into which fluid enters. The porous structure allows a relatively large amount of fluid to enter so that any movement of the oscillator is 100 percent due to the fluid. The difference between crystal resonance frequencies with and without fluid is recorded.