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2. Mercury pressure gauge - Wikipedia

   en.wikipedia.org/wiki/Mercury_pressure_gauge

   The parent of all mercury pressure gauges is the mercury barometer invented by Evangelista Torricelli in 1643. [15] An early engineering application of the mercury pressure gauge was to measure pressure in steam boilers during the age of steam. The first use on steam engines was by James Watt while developing the Watt steam engine between 1763 ...

3. Mercury Marine - Wikipedia

   en.wikipedia.org/wiki/Mercury_Marine

   Mercury Marine is a marine engine division ... and using the low-pressure area necessarily created by the gear housing and propeller moving through the water to ...

4. Inch of water - Wikipedia

   en.wikipedia.org/wiki/Inch_of_water

   It is also given as inches of water gauge (iwg or in.w.g.), inches water column (inch wc, in. WC, " wc, etc. or just wc or WC), inAq, Aq, or inH 2 O. The units are conventionally used for measurement of certain pressure differentials such as small pressure differences across an orifice, or in a pipeline or shaft, [ 1 ] or before and after a ...

5. Category:Pressure gauges - Wikipedia

   en.wikipedia.org/wiki/Category:Pressure_gauges

   Pages in category "Pressure gauges" The following 23 pages are in this category, out of 23 total. ... Mercury pressure gauge; Microbarometer; P. Pirani gauge;

6. Inch of mercury - Wikipedia

   en.wikipedia.org/wiki/Inch_of_mercury

   Inch of mercury (inHg and ″Hg) is a non-SI unit of measurement for pressure. It is used for barometric pressure in weather reports , refrigeration and aviation in the United States . It is the pressure exerted by a column of mercury 1 inch (25.4 mm) in height at the standard acceleration of gravity .

7. Millimetre of mercury - Wikipedia

   en.wikipedia.org/wiki/Millimetre_of_mercury

   Mercury manometers were the first accurate pressure gauges. They are less used today due to mercury's toxicity, the mercury column's sensitivity to temperature and local gravity, and the greater convenience of other instrumentation. They displayed the pressure difference between two fluids as a vertical difference between the mercury levels in ...