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The unit simply screws into and most drums,
tanks or vessels for easy local level
indication.
A tape measure with strong magnet potted to
the end is inserted into the tube.
A magnet equipped float slides on the probe and
follows the liquid level inside the tank.
To check the level simply
remove the cap and slowly lift the tape out.
You will feel the tape magnet couple with the
float magnet thus giving level taken from the
reading on the tape.
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