Gents,  Nothing to do with flying, but you may be able to assist.  I
have numerous trash pumps that need a thermocouple linked to a 3 Phase
cutout.  Yes I can buy a stock unit for over $3000 each which to me is
as hot as the pump can get.  All I need is a switch that will cut out
the pump (power) when it overheats due to dry running.  If it doesn;t
the pump then self destructs and $6000 later I am ready to go again.   
I can however get replacement pumps from china for $500 but without the
cutout.

So simple heat sensor switch that will go open at preset temp high
setting, say 90 - 100 degrees  C .  Possibly single phase to disconect 3
phase contactor.  Suggestions??>

Neil.


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