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resistor which reacts to moisture in soil or water.

 
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Feb27-12, 10:08 PM   #1
 

resistor which reacts to moisture in soil or water.

my friend and i are doing a DP lab, we are trying to find a resister which reacts to water/ moisture in soil. a resistor that is directly proportional to the moisture in the soil

thank you.
 
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Feb28-12, 09:40 AM   #2
 
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Could the soil itself be a resistive element?

http://www.ictinternational.com.au/appnotes/ICT227.htm
 
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