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

    Telemecanique Sensors
    Roller Lever
    3P
    2NC/1NO
    IP66, IP67
    6A
    Metal
    300V
    -
    -
    -
    Slow Break
    -
    -
    -
    -
    -
    -
    -
    Telemecanique Sensors
    Plunger
    DP
    NO/NC
    IP66, IP67
    10A
    Plastic
    240V
    250V
    -
    OsiSense XC
    Snap Action
    51mm
    58mm
    30mm
    -
    +70°C
    -25°C
    -
    ABB
    Roller Lever
    -
    1NO/1NC
    IP66
    -
    Zinc Alloy
    400V ac
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Telemecanique Sensors
    -
    DP
    2NC
    -
    1.5A
    Plastic
    240V
    250V
    -
    OsiSense XC
    Snap Action
    65mm
    31mm
    30mm
    -
    +70°C
    -25°C
    -
    Bernstein AG
    Roller Lever
    DPST
    NC/NO
    IP66, IP67
    5A
    Glass Fibre Reinforced Thermoplastic
    240V
    24V
    M20
    IN65
    Slow Action, Snap Action
    31mm
    101.5mm
    30.3mm
    -
    +75°C
    -30°C
    -
    Bernstein AG
    Roller Lever
    DPST
    NC/NO
    IP66, IP67
    5A
    Glass Fibre Reinforced Thermoplastic
    240V
    24V
    M20
    IN65
    Slow Action, Snap Action
    31mm
    105.5mm
    30.3mm
    -
    +75°C
    -30°C
    -
    Omron
    Hinge Lever
    SPDT
    -
    IP00
    15A
    -
    500V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Honeywell
    Roller Lever
    DPDT
    2NO/2NC
    IP67
    6A
    Die Cast Zinc
    600V
    250V
    PG13.5
    GLA
    Snap Action
    145.8mm
    42mm
    42mm
    -
    +85°C
    -25°C
    CCC, CE, CSA, UL
    Omron
    Roller Plunger
    SPDT
    NO/NC
    IP67
    1A
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Honeywell
    Roller Plunger
    SPDT 1NO/1NC
    NO/NC
    IP66
    10A
    Die Cast Zinc
    300V
    250V
    PG13.5
    GLC
    Snap Action
    68.5mm
    30.5mm
    26.35mm
    -
    +85°C
    -40°C
    -
    Honeywell
    Roller Lever
    SPDT
    NO/NC
    IP66
    10A
    Die Cast Zinc
    600V
    250V
    1/2 in NPT
    GLC
    Snap Action
    30.5mm
    30mm
    55mm
    -
    +85°C
    -40°C
    CCC, CE, CSA, UL
    Steute
    Plunger
    DPST
    NO/NC
    IP66
    T6 4.4 A, T5 6.6A
    Aluminium
    250V
    125V
    Cable
    Ex 98
    Positive Break, Slow Action
    1016mm
    2768.6mm
    1092.2mm
    IECEx
    +70°C
    -40°C
    -
    Honeywell
    Plunger
    SPDT
    -
    IP67
    10A
    Die Cast Zinc
    480V
    550V
    -
    LS
    Snap Action
    98.6mm
    40mm
    58.5mm
    -
    +150°C
    -10°C
    CSA
    Omron
    Rod
    DPDT
    NO/NC
    IP67
    2A
    Aluminium Alloy
    250V
    48V
    G1/2
    WL
    Double Break
    94.1mm
    40mm
    55mm
    -
    +80°C
    -10°C
    CE
    Telemecanique Sensors
    Roller Plunger
    4P
    2NO/2NC
    -
    -
    Metal
    -
    -
    Cable
    XCSM
    -
    70mm
    30mm
    16mm
    -
    -
    -
    -
    Omron
    Roller Lever
    SPDT
    NO/NC
    IP00
    15A
    Thermosetting Resin
    500V
    250V
    Solder
    Z
    Snap Action
    49.2mm
    39.4mm
    17.45mm
    -
    +80°C
    -25°C
    CSA Certified
    Telemecanique Sensors
    -
    3P
    2NO/1NC
    -
    6A
    Plastic
    240V
    250V
    -
    OsiSense XC
    Snap Action
    31mm
    30mm
    65mm
    -
    +70°C
    -25°C
    -
    Omron
    Long Hinge Lever
    SPDT
    -
    IP62
    15A
    -
    500V
    250V
    -
    Z
    Snap Action
    49.5mm
    33mm
    17.45mm
    -
    +80°C
    -25°C
    CCC, CE, CSA, UL
    Telemecanique Sensors
    -
    -
    2NO/2NC
    -
    10A
    -
    600V
    -
    -
    OsiSense XC
    Snap Action
    -
    -
    -
    -
    +70°C
    -25°C
    -
    Schmersal
    Roller Plunger
    -
    1NO/1NC
    IP65
    4A
    Die Cast Zinc
    230V ac
    -
    -
    EX-T
    -
    -
    -
    -
    -
    -
    -
    -
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