Densitometer

[Danial9874]

Hi ,
Densitometer is used to measure the density of the fuel
But how does the densitometer sense the density of fuel ?
Thank you.

[Wodrick]

All you will ever need to know, well more than really ! (https://books.google.es/books?id=zwmJI0I3qCMC&pg=PA174&lpg=PA174&dq=fuel+densitometer+principle&source=bl&ots=49p4cHk4PM&sig=ACfU3U1PwRL8Cyg4eVNmyko5j2fCrbSjBA&hl=en&sa=X&ved=2ahUKEwjH1dj_jLjmAhXR8uAKHbJZBsMQ6AEwFXoECDYQAQ#v=onepag e&q=fuel%20densitometer%20principle&f=false)