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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Description Price 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 Stock No. 189-5279
Mfr. Part No.6083000208
kr 219,32
Each
Units
Plunger DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 74mm
RS Stock No. 189-5282
Mfr. Part No.6083000221
kr 249,23
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 90mm
RS Stock No. 189-5290
Mfr. Part No.6083000235
kr 279,14
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 108mm
RS Stock No. 189-5285
Mfr. Part No.6083000229
kr 249,23
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 105.5mm
RS Stock No. 189-5283
Mfr. Part No.6083000222
kr 239,26
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 90mm
RS Stock No. 189-5291
Mfr. Part No.6083000236
kr 269,17
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 108mm
RS Stock No. 189-5287
Mfr. Part No.6083000255
kr 249,23
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 105.5mm
RS Stock No. 189-5268
Mfr. Part No.6088103001
kr 188,52
Each
Units
Plunger DPST NC/NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 250V Screw Slow Action, Snap Action TI2 - 30mm 57mm
RS Stock No. 189-5280
Mfr. Part No.6083000214
kr 259,20
Each
Units
Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 74mm
RS Stock No. 189-5293
Mfr. Part No.6083000243
kr 289,11
Each
Units
Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 101mm
RS Stock No. 189-5265
Mfr. Part No.6088171016
kr 303,06
Each
Units
Roller DPST NC/NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 250V Screw Slow Action, Snap Action TI2 - 30mm 67mm
RS Stock No. 189-5272
Mfr. Part No.6088185022
kr 371,35
Each
Units
Lever, Roller DPST NC/NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V - Screw Slow Action, Snap Action TI2 - 30mm -
RS Stock No. 189-5288
Mfr. Part No.6083000261
kr 239,26
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 101.5mm
RS Stock No. 189-5266
Mfr. Part No.6088153002
kr 223,81
Each
Units
Plunger DPST NC/NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 250V Screw Slow Action, Snap Action TI2 - 30mm 57mm
RS Stock No. 189-5274
Mfr. Part No.6083000201
kr 159,51
Each
Units
Plunger DPST NC/NO IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN62 - 31mm 74mm
RS Stock No. 189-5269
Mfr. Part No.6088817009
kr 279,14
Each
Units
Roller DPST 2NC IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 240V Screw Slow Action, Snap Action TI2 - 30mm 63.3mm
RS Stock No. 189-5295
Mfr. Part No.6083000245
kr 289,11
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 121mm
RS Stock No. 189-5281
Mfr. Part No.6083000215
kr 249,23
Each
Units
Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 74mm
RS Stock No. 189-5284
Mfr. Part No.6083000228
kr 259,20
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 105.5mm
RS Stock No. 189-5294
Mfr. Part No.6083000244
kr 269,17
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 105.5mm