Limit Switches, Rotary Lever & Plunger Limit Switch | RS
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    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.

    2110 Products showing for Limit Switches

    Honeywell
    Plunger
    SPDT
    NO/NC
    IP68
    4A
    Die Cast Zinc
    240V
    -
    Cable
    SSCE
    Snap Action
    54mm
    40mm
    16mm
    -
    +90°C
    -40°C
    -
    Omron
    Roller Plunger
    SPST
    NO/NC
    IP67
    10A
    -
    500V
    250V
    PG13.5
    WL
    Snap Action
    40mm
    67.3mm
    96.2mm
    -
    +85°C
    -10°C
    -
    Eaton
    Plunger
    -
    NO/NC
    IP66, IP67
    6A
    Plastic
    415V
    220V
    Cage Clamp
    LS-Titan
    Snap Action
    76mm
    33.5mm
    31mm
    -
    +70°C
    -25°C
    CE Certified, CSA, UL
    Telemecanique Sensors
    Roller Lever
    DPST
    1NC/1NO
    IP66
    3A
    Zamak Zinc Alloy
    240V
    250V
    PG13
    XCKJ
    Snap Action
    40mm
    60mm
    177mm
    -
    +70°C
    -25°C
    -
    Telemecanique Sensors
    Plunger
    DP
    NO/NC
    IP66, IP67, IP68
    1.5A
    Zinc Alloy
    240V
    250V
    Cable
    OsiSense XC
    Snap Action
    50mm
    30mm
    16mm
    -
    +70°C
    -25°C
    -
    Telemecanique Sensors
    -
    DP
    NO/NC
    IP66, IP67
    1.5A
    Zinc Alloy
    240V
    250V
    M12
    OsiSense XC
    Snap Action
    50mm
    30mm
    16mm
    -
    +70°C
    -25°C
    -
    Omron
    Roller Lever
    SPDT
    NO/NC
    IP65
    15A
    -
    480V
    250V
    -
    -
    Snap Action
    78.9mm
    86mm
    25.4mm
    -
    +80°C
    -10°C
    -
    Telemecanique Sensors
    Roller Lever
    3P
    2NC/1NO
    IP66
    6A
    Metal
    400V
    -
    -
    -
    Snap Action
    -
    -
    -
    -
    -
    -
    -
    Honeywell
    Rod
    SPDT
    NO/NC
    -
    10A
    Die Cast Zinc
    600V
    250V
    -
    HDLS
    Snap Action
    106.42mm
    1.62in
    2.43in
    -
    +121°C
    -40°C
    -
    Siemens
    Roller
    -
    2NC/1NO
    IP66, IP67
    4A
    Metal
    400V
    -
    -
    3SE5
    -
    -
    -
    -
    -
    -
    -
    -
    Telemecanique Sensors
    Roller Lever
    DPST
    NO/NC
    IP65
    10A
    Plastic
    240V
    250V
    M20
    OsiSense XC
    Snap Action
    72.5mm
    40mm
    36mm
    -
    +70°C
    -25°C
    -
    ABB
    Roller Plunger
    -
    1NO/1NC
    IP65
    -
    Fibreglass Plastic
    400V ac
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Honeywell
    Roller Lever
    SPDT
    1NC/1NO
    IP67
    10A
    Die Cast Zinc
    480V ac
    -
    PG13.5
    LS
    Snap Action
    1.92in
    3.45in
    4.59in
    -
    -
    -
    -
    Telemecanique Sensors
    Roller Lever
    DP
    NO/NC
    IP65
    10A
    Plastic
    240V
    250V
    M20
    OsiSense XC
    Snap Action
    30mm
    42.3mm
    157mm
    -
    +70°C
    -25°C
    -
    Eaton
    -
    4P
    NO/NC
    IP66
    20A
    Polyester
    690V
    -
    M25
    GHG 262
    -
    102mm
    84mm
    112mm
    ATEX
    +40°C
    -20°C
    -
    Telemecanique Sensors
    Lever
    DP
    NO/NC
    IP66
    10A
    Zinc Alloy
    240V
    250V
    -
    OsiSense XC
    Snap Action
    64mm
    63mm
    30mm
    -
    +70°C
    -25°C
    -
    Siemens
    Adjustable Roller Lever
    -
    1NC/1NO
    IP66, IP67
    4A
    Metal
    400V
    -
    -
    3SE5
    -
    -
    -
    -
    -
    -
    -
    -
    Telemecanique Sensors
    Plunger
    -
    2NC
    IP66
    -
    Metal
    -
    -
    Screw
    XCL-J
    -
    107mm
    44mm
    40mm
    -
    -
    -
    -
    Omron
    Lever
    SPDT
    NO/NC
    IP00
    15A
    Thermosetting Resin
    500V
    250V
    Screw
    Z
    Snap Action
    49.2mm
    29.4mm
    17.45mm
    -
    +80°C
    -25°C
    CSA
    Telemecanique Sensors
    -
    DP
    NO/NC
    IP65
    10A
    Metal
    240V
    250V
    -
    OsiSense XC
    Snap Action
    77mm
    40mm
    44mm
    -
    +70°C
    -25°C
    -
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