One of the mysteries of the English language finally explained.
A transparent tube or window through which the level of liquid in a reservoir or supply line can be checked visually.
- ‘On some equipment, a visual sight glass or gauge shows fluid levels without opening the system, while on others a dipstick or other manual measuring device is used.’
- ‘The sight glasses on the Mighty Demon's fuel howls permit safe, quick, float-level adjustments without the risk of fuel spillage.’
- ‘Babette pointed a red fingernail to the sight glass of the brass lubricator.’
- ‘An oil level sight glass, a tank pressure gauge and, of course, a pressure regulator and gauge are important, as each tool and job has a specific pressure requirement.’
- ‘The fuel bowls also feature a clear sight glass for fuel level verification and adjustment.’
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