When I was measuring the hydrogel resistance, I found that the data was not very stable because of the wire or the DIRECT current
Alessio Lerede
you can measure the resistivity of your conducting hydrogel using well known four probe method. Take the reciprocal of resistivity, then you can get the conductivity of your sample.
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Sun Zhao Jia
Alessio Lerede If we measure only the change in resistance, why is it unstable
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