OFF POINT
The OFF Point is located at the top of bracket mounting screw head, which is located on top side of the pump sensor. 
-  If the pump is hard mounted to the pump with a pump mounting bracket, then the off point will be where ever the top of the bracket mounting screw resides.
-  If the pump is mounted to the discharge pipe with a pipe mounting bracket, then the off point will be where ever the top of the bracket mounting screw resides

ON POINT
The ON Point is 10 inches above the OFF Point.  The OFF Point is located at the top of bracket mounting screw head, located on top side of the pump sensor. 

DIFFERENTIAL
The pumping range is 10" and is not adjustable.  
NOTE : - The switch must be ordered as a 6” switch or a 10” switch and cannot be modified to operated at different settings in the field

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The Ion™ Digital Level Control switch replaces traditional, unreliable, mechanical float switches using solid-state sensing technology eliminating contact points and moving parts. It is rated for both effluent and sewage use with pumps using a piggy back plug system. It is also for use with all 120 vac pumps up to 15 amps and inverter rated for use with most back up systems. The Ion™ Digital Level Control switch features an auto power reset, no-touch design; requiring no maintenance or cleaning.