I'm trying to measure flow keeping the sensors at 45 degrees as indicated in webench. However I'm not sure if I need a special mount or some holder to achieve correct result. I found this link on e2e but that doesn't resolve my query.
What I need to know is if there is suggestion on the material to be used for mounting since the change in medium from this mount to water would cause refraction and from preliminary calculations, it appears that use of any such material would restrict the length of flight within water
Regards,
Makarand