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  2. Bubble sensor - Wikipedia

    en.wikipedia.org/wiki/Bubble_sensor

    Liquids have a higher dielectric constant than gas; when an air bubble is in a fluid-filled tube the capacitance is reduced and the output voltage rises. [3] The size of the bubble is inversely related to the measured capacitance. Table 1 shows an example of the characteristics of a particular capacitive sensor being researched. [4]

  3. Capacitive sensing - Wikipedia

    en.wikipedia.org/wiki/Capacitive_sensing

    Capacitive sensors are constructed from many different media, such as copper, indium tin oxide (ITO) and printed ink. Copper capacitive sensors can be implemented on standard FR4 PCBs as well as on flexible material. ITO allows the capacitive sensor to be up to 90% transparent (for one layer solutions, such as touch phone screens).

  4. Capacitance probe - Wikipedia

    en.wikipedia.org/wiki/Capacitance_probe

    Capacitance sensors (or Dielectric sensors) use capacitance to measure the dielectric permittivity of a surrounding medium. The configuration is like the neutron probe where an access tube made of PVC is installed in the soil ; probes can also be modular (comb-like) and connected to a logger.

  5. Capacitive displacement sensor - Wikipedia

    en.wikipedia.org/wiki/Capacitive_displacement_sensor

    Capacitive displacement sensors share many similarities to eddy current (or inductive) displacement sensors; however capacitive sensors use an electric field as opposed to the magnetic field used by eddy current sensors [10] [11] This leads to a variety of differences between the two sensing technologies, with the most notable differences being ...

  6. Pigging - Wikipedia

    en.wikipedia.org/wiki/Pigging

    The blue plastic disks seal against the inside of the pipe to propel the device and to remove loose sedimentation or scale buildup. The black rectangles at the top and the circular disks in the center are magnets to attract and remove any loose metal objects in the pipe. An ultrasonic leak-detection pig.

  7. Three-dimensional electrical capacitance tomography - Wikipedia

    en.wikipedia.org/wiki/Three-dimensional...

    Additionally there must be a way to excite and detect signal to and from each electrode. The lack of constraints on the sensor design allow it to be made out of a variety of materials and take a plethora of forms including flexible walled, high temperature performance, high pressure performance, thin walled, elbowed and flat sensors.

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