High Pressure Limit Switch

Long distance light beam.

High pressure limit switch.

Switches are single pole double throw spdt so they switch one circuit on or off. Limit switch is a switch operated by the motion of a machine part or presence of an object they are used for control of a machine as safety interlocks or to count objects passing a point. They can be wired normally open no or normally closed nc. This pressure will be based on specifications for maximum pressure for the refrigeration systems high side and the type of refrigerant used.

Shorter and thinner than other safety limit switches these are sized to fit tight spaces. Compact safety limit switches. Rated ip69k these switches can withstand high pressure high temperature washdowns and temporary submersion. However they are commonly found on heat pumps.

High and low pressure switches may be installed on the refrigerant tubing of some air conditioning systems. It s also known as a fan limit switch or simply a limit switch. Designed for high pressure applications these switches electrically activate automated controls or alarms when a set pressure is reached. Standardized limit switches are industrial control components manufactured with a variety of operator types including lever roller plunger and whisker type.

They are often used in pump and hydraulic power applications. In the case of a heat pump in cooling mode the high pressure switch is used to make sure that outdoor unit can reject heat with the outside air. The key is to protect the compressor from extremely high pressures that could damage.