Liquid Level Systems
...specialists in liquid level measurements and control
By using the Counterflange.
The three elements which make up the instrument (switch, flange and float) are exactly the same. The only difference is the length and shape of the rod.
When the float reaches the lower stop collar the switch turns ON. When the float reaches the upper stop collar the switch turns OFF. The switch does not turn back on until the float reaches the lower stop collar again.