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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Omschrijving Prijs 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-stocknr. 410-7234
FabrikantnummerC2-U1Z ST.
FabrikantBernstein AG
16,20 €
Each
Aantal stuks
Plunger - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 410-6994
FabrikantnummerC2-SU1Z ST.
FabrikantBernstein AG
17,91 €
Each
Aantal stuks
Plunger - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 410-7111
FabrikantnummerC2-U1Z
FabrikantBernstein AG
15,03 €
Each
Aantal stuks
Radius - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 410-6988
FabrikantnummerC2-U1Z R
FabrikantBernstein AG
16,74 €
Each
Aantal stuks
Roller Tappet - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 410-7436
FabrikantnummerI88-SU1Z AH
FabrikantBernstein AG
36,67 €
Each
Aantal stuks
Spindle - NO/NC IP65 - Fibreglass - - Screw - I88 SU/U - 62mm 22mm
RS-stocknr. 410-7329
FabrikantnummerI88-U1 AV
FabrikantBernstein AG
38,48 €
Each
Aantal stuks
Spindle - NO/NC IP65 - Fibreglass - - Screw - I88 SU/U - 62mm 22mm
RS-stocknr. 410-7262
FabrikantnummerC2-A2Z ST.
FabrikantBernstein AG
19,09 €
Each
Aantal stuks
Plunger - 2NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 410-6972
FabrikantnummerC2-SU1Z R
FabrikantBernstein AG
17,91 €
Each
Aantal stuks
Roller Tappet - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 410-7408
FabrikantnummerI88-U1Z-HW
FabrikantBernstein AG
27,93 €
Each
Aantal stuks
Roller Lever - NO/NC IP65 - Fibreglass - - Screw - I88 SU/U - 62mm 22mm
RS-stocknr. 410-7341
FabrikantnummerC2-SU1Z
FabrikantBernstein AG
16,20 €
Each
Aantal stuks
Radius - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 189-5285
Fabrikantnummer6083000229
FabrikantBernstein AG
25,75 €
Each
Aantal stuks
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-stocknr. 189-5286
Fabrikantnummer6083000254
FabrikantBernstein AG
26,78 €
Each
Aantal stuks
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-stocknr. 189-5295
Fabrikantnummer6083000245
FabrikantBernstein AG
29,87 €
Each
Aantal stuks
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 121mm
RS-stocknr. 189-5296
Fabrikantnummer6083000268
FabrikantBernstein AG
29,87 €
Each
Aantal stuks
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 122.5mm
RS-stocknr. 189-5287
Fabrikantnummer6083000255
FabrikantBernstein AG
25,75 €
Each
Aantal stuks
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-stocknr. 189-5288
Fabrikantnummer6083000261
FabrikantBernstein AG
24,72 €
Each
Aantal stuks
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-stocknr. 189-5297
Fabrikantnummer6083000269
FabrikantBernstein AG
27,81 €
Each
Aantal stuks
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 119.5mm
RS-stocknr. 177-9027
FabrikantnummerSK-Bet.M4 kpl. m.Kap.
FabrikantBernstein AG
3,41 €
Each
Aantal stuks
- - NC IP65 - Thermoplastic PA - - - - SK - 52mm 29mm
RS-stocknr. 189-5298
Fabrikantnummer6083000246
FabrikantBernstein AG
31,93 €
Each
Aantal stuks
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 123.5mm
RS-stocknr. 189-5289
Fabrikantnummer6083000262
FabrikantBernstein AG
23,69 €
Each
Aantal stuks
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN65 - 31mm 101.5mm