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. 186-8425
FabrikantnummerGLEB01C
FabrikantHoneywell
62,69 €
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Roller Plunger SPDT NO/NC IP66 10 A Die Cast Zinc 300V 250V Snap-On Snap Action GLE PG13.5 Connector 50mm 65mm
RS-stocknr. 836-2731
FabrikantnummerD4B4A11N
FabrikantOmron
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Roller Lever - 2NC IP67 - Metal - - Screw - D4B - 40mm 62mm
RS-stocknr. 905-5141
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408,37 €
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Plunger 2P NO/NC IP67 6 A Aluminium 250V - M20 Snap Action - Screw 79mm 36mm
RS-stocknr. 808-2735
Fabrikantnummer914CE3-3
FabrikantHoneywell
76,21 €
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Aantal stuks
Roller Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE Wire Lead 40mm 16mm
RS-stocknr. 447-3834
FabrikantnummerXCMD2110L1
52,00 €
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Plunger DP NO/NC IP66, IP67, IP68 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 50mm 30mm
RS-stocknr. 308-1793
FabrikantnummerGLCB01B
FabrikantHoneywell
41,44 €
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Plunger 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
RS-stocknr. 311-2392
FabrikantnummerGLAB01E7B
FabrikantHoneywell
77,67 €
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Coil Spring SPDT NO/NC IP67 6 A Die Cast Zinc 600V 250V - Snap Action GLA PG13.5 Connector 145.8mm 42mm
RS-stocknr. 410-6988
FabrikantnummerC2-U1Z R
FabrikantBernstein AG
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Roller Tappet - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm
RS-stocknr. 766-1700
FabrikantnummerXCSM3902L1
78,10 €
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Roller Plunger 3P NO/2NC - - Metal - - Cable - XCSM - 70mm 30mm
RS-stocknr. 700-4305
FabrikantnummerXCKJ10511H29
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Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS-stocknr. 621-1515
FabrikantnummerD4N-1120
FabrikantOmron
17,59 €
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Roller Lever SPDT NO/NC IP67 - - - - Screw - D4N - 73mm 31mm
RS-stocknr. 609-3862
FabrikantnummerZCMD21L5
63,40 €
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Aantal stuks
- DP NO/NC - 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 50mm 30mm
RS-stocknr. 308-294
Fabrikantnummer266114 & LS-11D
FabrikantEaton
21,36 €
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Plunger - NO/NC IP66, IP67 6 A Plastic 415V 220V Cage Clamp Snap Action LS-Titan Screw 76mm 33.5mm
RS-stocknr. 498-5567
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Telescope Arm - NO/NC - - Metal - - - - 440P - 71mm 40mm
RS-stocknr. 447-3402
FabrikantnummerXCKP2102P16
28,50 €
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Plunger DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS-stocknr. 814-7848
FabrikantnummerXCKD2102M12
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Roller Plunger DPST NO/NC IP66, IP67 4 A Zamak® Zinc Alloy 60V - M12 Snap Action OsiSense XC 5-Pin Connector 65mm 31mm
RS-stocknr. 700-4210
FabrikantnummerZCKM5
27,60 €
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- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Slow Action OsiSense XC Wire Lead 64mm 58.5mm
RS-stocknr. 760-5722
FabrikantRS PRO
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- - NO/NC IP67 - Aluminium - - M20 - - Terminal Strip 112mm 88mm
RS-stocknr. 621-1537
FabrikantnummerD4N-1131
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Plunger SPDT NO/NC IP67 - - - - Screw - D4N - 73.2mm 31mm
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