APG MLS Movable Float user manual - Manual (Page 5)

Rev. B1, 4/07 MLS Series
5
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• Operating Principle
The fl oat travels between both
fl oat stops. The microswitch does not
actuate until it reaches either stops. The
lower level is actuated by the weight
of the fl oat. The upper level is actuated
by the force against buoyancy of the
fl oat. Hence, the hystereis established
between stops.