GE 369-HI-R-0-M-0-0-0

General Electric (and now Emerson) uses an alphanumeric code where each segment specifies a different characteristic of the switch.

Here is the detailed breakdown:

• GE: The manufacturer (General Electric, now part of Emerson).
• 369: The series number. This indicates it’s a “Series 3” heavy-duty industrial limit switch, known for its durability, modular design, and variety of actuator and operator head options.
• HI: Operator Head Type. “HI” specifically refers to a Maintained Contact, Side Rotary, Left Hand operator head. This means the switch has a lever that is actuated from the side, and its contacts stay in their new state (either open or closed) until the lever is moved back.
• R: Actuator Type. “R” stands for Roller Lever. This is the type of tip on the end of the lever, which is a small wheel (roller) designed to reduce friction and wear when it comes into contact with the machine part.
• 0: Actuator Length. “0” typically indicates a Standard Length lever.
• M: Electrical Rating / Contact Block. “M” specifies the Contact Arrangement. In this case, it usually means 1 Normally Open (NO) and 1 Normally Closed (NC) contact. This is a very common configuration.
• 0: Conduit Entry. “0” signifies 2 Conduit Openings, 3/4″ NPT. This is the standard connection for electrical conduit.
• 0: Sealing. “0” means Unsealed. This switch is not designed for environments where it would be sprayed with water or oil (it is not oil-tight or water-tight).
• 0: Hardware. The final “0” often indicates Standard Hardware (e.g., standard mounting nuts and bolts).

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• Summary of the Part’s Characteristics:
• In simple terms, the GE 369-HI-R-0-M-0-0-0 is:
• Function: A heavy-duty limit switch.
• Actuation: A side-mounted lever with a roller on the end.
• Operation: Maintained contact (stays on or off until the lever is moved back).
• Electrical: Has one NO and one NC switch contact.
• Environment: For general industrial use, not for wet or oily conditions.

Common Application:

This type of switch is used throughout industrial automation to detect the presence, absence, or position of a machine part. For example, it could be used on the end of a linear slide to tell the programmable logic controller (PLC) that a robot has reached its “home” position, or on a large door to ensure it is fully closed before a process can start.