Schneider Electric 2FH78 Closed Tank Float Switch

Schneider Electric's Telemecanique Sensors 2FH78 Closed Tank Float Switch is a Close On Rise, DPST-2NC dual‑contact level switch intended for automatic liquid level control in closed tanks. It is a closed-tank, vertical device that mounts through holes on the sides of containers and vessels. The 2FH78 provides two normally closed contacts (DPST-2NC) to switch two circuits as the liquid level changes. Schneider Electric describes this family of devices as automatic liquid level controllers for closed tanks, with installation and wiring guidelines in their instruction sheets. Common applications include controlling pumps or valves in closed-tank systems where reliable level sensing is required.