toroidal conductivity sensor
- From: "timmy" <bhat9@xxxxxxxxxxx>
- Date: 12 Aug 2005 01:45:00 -0700
hi there
i am a student and making a project on toroidal conductivity sensor to
measure conductivity.
the project is based on :that you pass a ac to toroidal core (high
permeability)
with AC through a winding. Then you place a second toroid beside that
one with another winding. The two cores are enclosed in insulation,
with a hole passing through both cores. When submersed, the first
core induces 1 turn's worth of voltage around the liquid loop that
passes through the hole. The current that voltage moves through the
liquid is sensed by the second core, acting as a current transformer.
You amplify the AC current from the second core, rectify it, and the
result represents the conductivity of the solution.
i did some calculation to find inductance:
XL=2*pi*F*L
F=8 kHz
L=4mhenry
XL=200ohms
Max voltage=3 volts
I=V/ XL
I=15ma(approx)
now please i want to know how can i start the first step to do in
practical
thanks
rohan
.
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