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  2. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    Residential meters: 5/8 inch (commonly referred to as "5/8 x 3/4 inch"), 3/4 inch, and 1 inch. [ 8 ] Commercial/Industrial meters: Sizes range from 1½ inches to 12 inches or larger, depending on flow requirements and system design.

  3. Magnetic flow meter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_flow_meter

    The magnetic flow meter requires a conducting fluid, for example, water that contains ions, and an electrical insulating pipe surface, for example, a rubber-lined steel tube. If the magnetic field direction were constant, electrochemical and other effects at the electrodes would make the potential difference difficult to distinguish from the ...

  4. Smart meter - Wikipedia

    en.wikipedia.org/wiki/Smart_meter

    The term smart meter often refers to an electricity meter, but it also may mean a device measuring natural gas, water or district heating consumption. [1] [2] More generally, a smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor.

  5. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    1.0 mm – 1/1,000 of a meter; 1.0 mm – 0.03937 inches or 5/127 (exactly) 1.0 mm – side of a square of area 1 mm²; 1.0 mm – diameter of a pinhead; 1.5 mm – average length of a flea [27] 2.54 mm – distance between pins on old dual in-line package (DIP) electronic components; 5 mm – length of an average red ant

  6. Project Neptune (water distribution system) - Wikipedia

    en.wikipedia.org/wiki/Project_Neptune_(water...

    Project Neptune is a water distribution project in the United Kingdom with the goal of establishing an optimized and more sustainable system for water distribution. The project was officially announced in April 2007, and received a budget of £2.7 million.

  7. pH meter - Wikipedia

    en.wikipedia.org/wiki/PH_meter

    A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2] The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, and so the pH meter is sometimes referred to as a "potentiometric pH meter".