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| 1/21/2012 7:36 PM | |
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Posts: 48 Rating:
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Conductivity Controller uses AC voltage to determine the conductivity of a liquid but not DC voltage. Can anybody please tell me why DC is not used? |
| 1/21/2012 9:47 PM | |
Joined: 9/27/2006 Last visit: 9/10/2025 Posts: 12405 Rating:
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Hello masimn; The explanation to your queston can be found easily on the web, for example in the Wikipedia article on Conductivity Meters: Industrial conductivity probes often employ an inductive method, which has the advantage that the fluid does not wet the electrical parts of the sensor. Here, two inductively-coupled coils are used. One is the driving coil producing a magnetic field and it is supplied with accurately-known voltage. The other forms a secondary coil of a transformer. The liquid passing through a channel in the sensor forms one turn in the secondary winding of the transformer. The induced current is the output of the sensor. Remember that induction (and the operation of coils and transformer windings) only work with AC current. For a more complete description: http://en.wikipedia.org/wiki/Conductivity_meter Hope this helps, Daniel Chartier |
| 1/22/2012 7:08 PM | |
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Posts: 48 Rating:
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Thank You for your reply |
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