The "Mayur Instruments" make window type sight glass. It is a reliable device for direct reading the level of liquid. It is a simplest form of level indicator. These level indicators find wide application for level measurement in process tanks, batching tanks / storage / overhead etc.
"Mayur Instruments" make Window Type Sight Flow indicator suitable for transparent slightly opaque solution and it may be used for gases m2 & High Pressure / High Temperature.