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 Prix 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
N° de stock RS 195-1727
Référence fabricantZCKJ4
68,52 €
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- 2P 2CO IP66 3 A Metal 240V 250V PG 13.5 Snap Action ZCKJ Screw 40mm 60mm
N° de stock RS 902-6896
MarqueRS PRO
22,06 €
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Unité
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172.5mm
N° de stock RS 179-9983
Référence fabricantZCKJ404H29
102,00 €
Each
Unité
Spring Return Rotary Head 2P 2NO/2NC IP66 3 A Metal 240V 250V Screw Snap Action OsiSense XC Screw 43mm 60mm
N° de stock RS 132-9972
Référence fabricantXCSPL791
47,10 €
Each
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Elbowed Flush Lever DP 2NC IP67 - Nylon 66, Plastic - - PG11 - XCSPL - 30mm 103mm
N° de stock RS 447-4635
Référence fabricantXCSM3910L2
74,80 €
Each
Unité
Plunger Head - NO/2NC IP66, IP67, IP68 - Metal - - Screw - XCSM - 60mm 30mm
N° de stock RS 195-1700
Référence fabricantXCMD2145M12
82,50 €
Each
Unité
Roller Lever SPDT 1CO IP66, IP67, IP68 1.5 A Zamak 240V 250V M12 Snap Action XCMD - 30mm 16mm
N° de stock RS 195-1680
Référence fabricantXCKP2128G11
42,89 €
Each
Unité
Roller Lever DPST 1NC/1NO IP66, IP67 10 A Plastic 240V 250V PG 11 Snap Action XCKP Screw 31mm 30mm
N° de stock RS 240-2650
Référence fabricantGLEB07A1B
MarqueHoneywell
65,94 €
Each
Unité
Rotary Lever SPDT NO/NC IP67 100 mA Die Cast Zinc 50V 50V - Snap Action GLE PG13.5 Connector 106.5mm 65mm
N° de stock RS 766-1627
Référence fabricantXCSD3918P20
75,50 €
Each
Unité
Rotary Lever 3P NO/2NC - - Metal - - Cable - XCSD - 122mm 34mm
N° de stock RS 123-6429
Référence fabricant176883 & LS-20-CC
MarqueEaton
26,30 €
Each
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Plunger - 2NO IP65 3 A @ 24 V dc, 6 A @ 24 V ac Cold Climate Insulated Plastic 415V 220V Cage Clamp Snap Action LS-Titan - 31mm 33.5mm
N° de stock RS 539-325
Référence fabricant83872301
MarqueCrouzet
77,48 €
Each
Unité
Plunger - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 49mm 30mm
N° de stock RS 203-3913
Référence fabricant3SE5232-0LC05-1CA0
MarqueSiemens
29,00 €
Each
Unité
Plunger - 1 NO/2 NC IP65 6 A Plastic 400V - - Snap Action - - - -
N° de stock RS 746-7251
Référence fabricantD4N-4131
MarqueOmron
15,76 €
Each
Unité
Plunger DPST NO/NC - - - - - Screw - D4N - 64mm 31mm
N° de stock RS 766-1725
Référence fabricantXCSM4102L1
84,20 €
Each
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Roller Plunger 4P 2NO/2NC - - Metal - - Cable - XCSM - 70mm 30mm
N° de stock RS 814-7804
Référence fabricantXCKP2102M12
43,90 €
Each
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Roller Plunger DPST NO/NC IP66, IP67 3 A Plastic 250V - M12 Snap Action OsiSense XC 4 Pin 65mm 31mm
Nouveau
N° de stock RS 211-0143
Référence fabricant3SE5114-1CA00-1AF5
MarqueSiemens
82,80 €
Each
Unité
Plunger 5P 1NO/1NC IP66, IP67 3 A Metal 125V - - - - - - -
N° de stock RS 344-3630
Référence fabricantGLCB06A1Y
MarqueHoneywell
47,61 €
Each
Unité
Roller Lever DPST 2NC 2NC IP66 10 A Die Cast Zinc 300V 300V Internal Screw Terminal Contact Block Slow Action GLC PG13.5 Conduit 68.5mm 30.5mm
N° de stock RS 230-1850
Référence fabricantXCKS101
34,80 €
Each
Unité
Plunger DP NO/NC IP65 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
N° de stock RS 768-6336
Référence fabricant3SE5132-0CA00
MarqueSiemens
22,50 €
Each
Unité
Round Plunger - NO/NC - - Plastic - - Screw - 3SE5 - 40.5mm 37.3mm
N° de stock RS 189-5275
Référence fabricant6083000202
MarqueBernstein AG
17,51 €
Each
Unité
Plunger DPST 2NC IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action IN62 - 31mm 74mm