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  2. Water management device - Wikipedia

    en.wikipedia.org/wiki/Water_management_device

    Smart meters can also be used in communities who are serviced by standpipes to monitor the flow of water and report leakage or dysfunction. [citation needed] Installation of water management devices in Cape Town, South Africa has led to complaints by residents who perceive this intervention as a draconian, unilateral action by the City. [5]

  3. Flow control structure - Wikipedia

    en.wikipedia.org/wiki/Flow_control_structure

    A flow control structure is a device that alters the flow of water in a stream, drainage channel or pipe. As a group these are passive structures since they operate without intervention under different amounts of water flow and their impact changes based on the quantity of water available.

  4. Rotameter - Wikipedia

    en.wikipedia.org/wiki/Rotameter

    A rotameter is a device that measures the volumetric flow rate of fluid in a closed tube. [ 1 ] It belongs to a class of meters called variable-area flowmeters , which measure flow rate by allowing the cross-sectional area the fluid travels through to vary, causing a measurable effect.

  5. Mass flow controller - Wikipedia

    en.wikipedia.org/wiki/Mass_flow_controller

    The flow rate is specified as a percentage of its calibrated full scale flow and is supplied to the MFC as a voltage signal. Mass flow controllers require the supply gas or liquid to be within a specific pressure range. Low pressure will starve the MFC of fluid and cause it to fail to achieve its setpoint. High pressure may cause erratic flow ...

  6. Flow measurement - Wikipedia

    en.wikipedia.org/wiki/Flow_measurement

    Because they are used for domestic water measurement, piston meters, also known as rotary piston or semi-positive displacement meters, are the most common flow measurement devices in the UK and are used for almost all meter sizes up to and including 40 mm (1 + 1 ⁄ 2 in). The piston meter operates on the principle of a piston rotating within a ...

  7. Positive displacement meter - Wikipedia

    en.wikipedia.org/wiki/Positive_displacement_meter

    A positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement. Positive displacement (PD) flow meters measure the volumetric flow rate of a moving fluid or gas by dividing the media into fixed, metered volumes (finite increments or volumes of the fluid).

  8. Ultrasonic flow meter - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_flow_meter

    Schematic view of a flow sensor. An ultrasonic flow meter is a type of flow meter that measures the velocity of a fluid with ultrasound to calculate volume flow. Using ultrasonic transducers, the flow meter can measure the average velocity along the path of an emitted beam of ultrasound, by averaging the difference in measured transit time between the pulses of ultrasound propagating into and ...

  9. Oil content meter - Wikipedia

    en.wikipedia.org/wiki/Oil_Content_Meter

    The oil content meter will sound an alarm if the liquid leaving the system has an unsatisfactory amount of oil in the mixture. If it is still above that standard, then the bilge water will be reentered into the system until it meets the required criteria. The OCM uses light beams to determine how oily the water in the system is. [4]