What is another word for sight glass?
Pronunciation: [sˈa͡ɪt ɡlˈas] (IPA) 
Sight glass is a transparent or translucent device that allows one to see the level and flow of fluids in pipes and tanks, particularly in industrial and mechanical applications. However, there are different terms used to describe these types of devices such as level gauge, liquid level indicator, liquid level gauge, and view ports. A level gauge is a vertical or horizontal device that indicates the liquid's level by using a float connected to a gauge or a differential pressure system. A liquid level indicator is a strip of material or float that reacts to the liquid's level. A liquid level gauge is a mechanical or electronic device that displays the level measurement. View ports, on the other hand, allow a view of the fluid or the process within their enclosure.
