When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Electrical conductivity meter - Wikipedia

   en.wikipedia.org/wiki/Electrical_conductivity_meter

   An electrical conductivity meter. An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. [1] It has multiple applications in research and engineering, with common usage in hydroponics, aquaculture, aquaponics, and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.

3. Geophysical survey (archaeology) - Wikipedia

   en.wikipedia.org/wiki/Geophysical_survey...

   Electromagnetic (EM) conductivity instruments have a response that is comparable to that of resistance meters (conductivity is the inverse of resistance). Underground archaeological features are detected by creating a magnetic field underground by applying an electric current that has a known frequency and magnitude through a sending coil.

4. Eddy-current testing - Wikipedia

   en.wikipedia.org/wiki/Eddy-current_testing

   Frost & Sullivan analysis in the global NDT equipment market in 2012 estimated the magnetic and electromagnetic NDT equipment market at $220 million, which includes conventional eddy current, magnetic particle inspection, eddy current array, and remote-field testing. This market is projected to grow at 7.5% compounded annual growth rate to ...

5. Electrical resistivity and conductivity - Wikipedia

   en.wikipedia.org/wiki/Electrical_resistivity_and...

   Electrical conductivity of water samples is used as an indicator of how salt-free, ion-free, or impurity-free the sample is; the purer the water, the lower the conductivity (the higher the resistivity). Conductivity measurements in water are often reported as specific conductance, relative to the conductivity of pure water at 25 °C.

6. Eddy current - Wikipedia

   en.wikipedia.org/wiki/Eddy_current

   Eddy currents in conductors of non-zero resistivity generate heat as well as electromagnetic forces. The heat can be used for induction heating. The electromagnetic forces can be used for levitation, creating movement, or to give a strong braking effect. Eddy currents can also have undesirable effects, for instance power loss in transformers.

7. Magnetotellurics - Wikipedia

   en.wikipedia.org/wiki/Magnetotellurics

   The ratio of the electric field to magnetic field provides simple information about subsurface conductivity. Because the skin effect phenomenon affects the electromagnetic fields, the ratio at higher frequency ranges gives information on the shallow Earth, whereas deeper information is provided by the low-frequency range. The ratio is usually ...