This problem can be solved using ultrasound sensors, but I haven't heard about
the company, that is
allready selling such sensors.
I assume, that such sensor must be developed. If you you are interested, I can
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b email@example.com (Clairvoyant) wrote in message
I would suggest an analog capacitative sensor. This will detect the
increase in Er as the ice/water replaces air. It will work through
sheet plastic or glass.
You will need to calibrate you analog output if you really want to
measure thickness. I suggest you use sheet plastic of equicalent Er to
water or learn how to freez panes of water or just make ice.
Just an example:
This device has a 40mm square integral sensor with two, 6-32 threaded
inserts. These inserts allow you to add an expanded sensing element,
for increased sensitivity or application-specific customization of the
It has a 1-6 VDC analog output, which is linear with respect to
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