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Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area.
Mercury is a useful material to use in a manometer because of its high density. This means that a much shorter column is needed compared to water. [2] For instance, the pressure represented by a column of 100 mm of water is just under 7.4 mm of mercury . [3]
A sphygmomanometer (/ ˌ s f ɪ ɡ m oʊ m ə ˈ n ɒ m ɪ t ə r / SFIG-moh-mə-NO-mi-tər), also known as a blood pressure monitor, or blood pressure gauge, is a device used to measure blood pressure, composed of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner, [1] and a mercury or aneroid manometer to measure the pressure.
A glass McLeod gauge, drained of mercury. A McLeod gauge is a scientific instrument used to measure very low pressures, down to 10 −6 Torr (0.133 mPa).It was invented in 1874 by Herbert McLeod (1841–1923). [1]
WIKA Alexander Wiegand SE & Co. KG is a company which manufactures pressure and temperature measuring equipment. [1]As of 2023, the company employed about 11,200 people at its 45 subsidiaries and production sites worldwide.
The company was founded in 1949 by Orla and Svend Aage Jørgensen; it originally focused on the production of thermometers and manometers for ships and various other metal components. [3] Following its purchase by Thorkild Juncker, Terma A/S refocused itself on the production of electronic measuring instruments along with early radar systems ...