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  2. Inch of water - Wikipedia

    en.wikipedia.org/wiki/Inch_of_water

    Feet of water is an alternative way to specify pressure as height of a water column; it is conventionally equated to 2,989.067 pascals (0.4335275 psi). [ 3 ] In North America , air and other industrial gases are often measured in inches of water when at low pressure.

  3. Gauge (instrument) - Wikipedia

    en.wikipedia.org/wiki/Gauge_(instrument)

    Strain gauge: a device used to measure the strain of an object. Thread pitch gauge, also called a threading gauge, pitch gauge, or screw gauge a device used to measure the pitch or lead of screw threads. Vernier height gauge: a measuring device used either for determining the height of something, or for repetitious marking of items to be worked on.

  4. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    Lux meter for measuring illuminance, i.e. incident luminous flux per unit area; Luminance meter for measuring luminance, i.e. luminous flux per unit area and unit solid angle; Light meter, an instrument used to set photographic exposures. It can be either a lux meter (incident-light meter) or a luminance meter (reflected-light meter), and is ...

  5. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    Water metering is the practice of measuring water use. Water meters measure the volume of water used by residential and commercial building units that are supplied with water by a public water supply system. They are also used to determine flow through a particular portion of the system.

  6. Mercury pressure gauge - Wikipedia

    en.wikipedia.org/wiki/Mercury_pressure_gauge

    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] The pressure is determined by measuring the difference in height between the reference column and the column connected to the item under test.

  7. Gauge - Wikipedia

    en.wikipedia.org/wiki/Gauge

    Gauge block, a metal or ceramic block of precisely known dimension, used in measuring; Sight glass, also known as a water gauge, for measuring liquid level heights in storage tanks and pressure vessels; Boost gauge, a gauge used in conjunction with turbo-super-chargers; Pressure gauge or vacuum gauge, see pressure measurement; Gauge pressure ...

  8. Snow gauge - Wikipedia

    en.wikipedia.org/wiki/Snow_gauge

    The snow gauge consists of two parts: a copper catchment container; and the funnel-shaped gauge itself. The actual gauge is mounted on a pipe outdoors and is approximately 1.5 m (150 cm; 59 in; 4 ft 11 in) in height, while the container is 51.5 cm (20.3 in; 1 ft 8.3 in) in length. [citation needed]

  9. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    The reduction length is usually equal to the average of the larger and smaller pipe diameters. Although reducers are usually concentric, eccentric reducers are used as needed to maintain the top- or bottom-of-pipe level. A reducer can also be used either as a nozzle or diffuser, depending on the mach number of the flow. [citation needed]

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