Square D 9036 Heavy-Duty Open Tank Float Switch, NEMA 1, Contacts Close on Rise, 1 NO - 1 NC Contact Configuration: Electronic Component Limit Switches: Amazon.com: Industrial & Scientific
Float switch - Wikipedia
Float Switch | Float Switches from Pepperl+Fuchs | Group Overview
Level Switches: Types, Uses, Features and Benefits
40 Series Horizontal Float Switch - Deeter Electronics USA
Operating Principle of Float and Displacer Level Switches and Sensors ~ Learning Instrumentation And Control Engineering
Float level switch - Reed Electronics AG - for liquids / stainless steel / miniature