i am having trouble with a problem about a capacitor based sensor.. i am to propose two seperate capacitance based sensors, one for soil moisture and another for water level..(adsbygoogle = window.adsbygoogle || []).push({});

my problem is finding the time constant inorder to find C

so i can use the equation C = k(e0)A/d to solve for k... as i would know C, A and d in my proposed system

i know that C= T/R my R will be know except T which i can find... i know i can get T with a frequency meter device, but because i have little knowledge of what it is, i have no idea where i would place this device onto my capacitor circuit... (which is where my problem lies) how would i place a frequency meter into a simple RC circuit?

im not sure if im on the right track, any help would be much appreciated

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# Homework Help: Water level sensor

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