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  2. Sight glass - Wikipedia

    en.wikipedia.org/wiki/Sight_glass

    Sight glass. Water gauge on a steam locomotive. Here the water is at the “top nut”, the maximum working level. Note the patterned backplate to help reading and toughened glass shroud. A sight glass or water gauge is a type of level sensor, a transparent tube through which the operator of a tank or boiler can observe the level of liquid ...

  3. Level sensor - Wikipedia

    en.wikipedia.org/wiki/Level_sensor

    Hydrostatic pressure level sensors are submersible or externally mounted pressure sensors suitable for measuring the level of corrosive liquids in deep tanks or water in reservoirs.

  4. Tank leak detection - Wikipedia

    en.wikipedia.org/wiki/Tank_leak_detection

    There are methods combining automatic tank gauges with statistical inventory reconciliation where gauge provides liquid level and temperature data to a computer running SIR software, which performs the analysis to detect leaks.

  5. Float switch - Wikipedia

    en.wikipedia.org/wiki/Float_switch

    A pedestal sump pump with a float switch. A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float. Another common type is a float that ...

  6. Hydrostatic test - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_test

    Hydrostatic tester A hydrostatic test is a way in which pressure vessels such as pipelines, plumbing, gas cylinders, boilers and fuel tanks can be tested for strength and leaks. The test involves filling the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection, and pressurization of the vessel to the specified test pressure. Pressure tightness ...

  7. Float (liquid level) - Wikipedia

    en.wikipedia.org/wiki/Float_(liquid_level)

    Float (liquid level) Liquid level floats, also known as float balls, are spherical, cylindrical, oblong or similarly shaped objects, made from either rigid or flexible material, that are buoyant in water and other liquids. They are non-electrical hardware frequently used as visual sight-indicators for surface demarcation and level measurement.