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Jim Sower wrote:
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Next thing I would do is drive my coolant alert alarms with
coolant pressure. I believe that in case of primary failure,
the coolant pressure will start rising a good bit before the
temp [readings].
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That's what I think .... Jim S.
It would be relatively trivial to design a circuit that uses current sensing to detect pump failure. Current to the pump that falls either above or below the design window can be used to trigger an alarm or activate the backup. Response would be nearly instant.
Charlie
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