The base is solid stainless steel with an anti-turbulence oriface to keep the liquid steady within the sight glass while there is a rolling boil in the pan it is connected to. The glass is fire polished and shatter-resistant. The scale can be placed by you to ensure the level is perfectly calibrated to your pan.
If your float box doesn’t have a drain on the bottom of it, please contact us. We may be able to add a port to it for you to accept our sight glass.