Limit Switches

Limit switches are a contact proximity sensor device that consists of an actuator mechanically linked to a set of output contacts. When an object comes into contact with the actuator, the device operates the contacts to make or break an electrical connection.

Limit Switch Makeup

Limit switches are made up of three key components:
•Actuator Head - The actuator is the part of the switch that makes physical contact with the object. In some limit switches, the actuator is attached to an operating head which translates a rotary, linear, or perpendicular motion to open or close the electrical contacts of the switch.


•Switch Body – The switch body is the component containing the electrical contact mechanism, the contacts within the body open or close the electrical circuit when the actuator is activated.


•Receptacle/Terminals - The component containing the terminal screws or screw/clamp assembly necessary for wiring purposes.



Actuator Types

Limit switches are available with a wide range of actuator types. The type of actuator used can be determined by the mounting position, force required and objects to be detected.
•Rotary Lever - with lever actuators, a cam or plate hits the end of the lever arm which in turn rotates a shaft and operates the contacts in the switch. The rotation may be spring returned (momentary) or maintained.


•Plunger - Plunger types are best where short controlled machine movements are present or where mounting space does not permit a lever type.


•Cat Whisker or Coil Spring – Longer actuators with a coil wire that can be moved/bent in multiple directions. Typically used in conveying applications to count objects as they pass by.


•Forked – Used with maintained contacts, consisting of two roller levers. One roller will trip the switch and when the second is moved to the opposite direction it will reset the switch.

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제품설명 단가 Actuator Type Pole and Throw Configuration Normal State Configuration IP Rating Maximum Current Housing Material Maximum AC Voltage Maximum DC Voltage Connection Type Contact Type Series Terminal Type Length Width
RS 제품 번호 202-3847
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제조사CEAG
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- 3P NO/2NC - - Polyamide - - Screw - - - 102mm 84mm
RS 제품 번호 186-8251
제조사 부품 번호GLAC01A2B
제조사Honeywell
₩152,992.75
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Rotary Lever SPDT NO/NC IP67 6 A Die Cast Zinc 600V 250V - Snap Action GLA 20 mm Conduit 145.8mm 42mm
RS 제품 번호 308-1664
제조사 부품 번호GLCB01A2A
제조사Honeywell
₩56,500.60
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Adjustable Roller Lever SPDT 1NO/1NC NO/NC IP66 10 A Die Cast Zinc 300V 300V Internal Screw Terminal Contact Block Snap Action GLC PG13.5 Conduit 68.5mm 30.5mm
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RS 제품 번호 410-6900
제조사 부품 번호SK-A2Z M
제조사Bernstein AG
₩37,409.25
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RS 제품 번호 207-1981
제조사 부품 번호GLBC02A4J
제조사Honeywell
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RS 제품 번호 186-8504
제조사 부품 번호GLFC01A2B
제조사Honeywell
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Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 250V 250V - Snap Action GLF 20 mm Conduit 145.8mm 42mm
RS 제품 번호 410-6922
제조사 부품 번호SKC-A1Z M
제조사Bernstein AG
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제조사RS PRO
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RS 제품 번호 700-4245
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Plunger DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS 제품 번호 447-3418
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Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS 제품 번호 749-7640
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Roller Lever 4PST 2NO/2NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 107.7mm 56mm
RS 제품 번호 410-6916
제조사 부품 번호SK-U1Z M
제조사Bernstein AG
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Radius - NO/NC IP65 - Fibreglass - - Screw - ENM2 - 90mm 52mm
RS 제품 번호 410-6893
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