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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Nombre de résultats par page
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
Nouveau
N° de stock RS 221-2879
Référence fabricantXCKP2139P16
49,80 €
Each
Unité
Roller - 1NC/1NO IP66, IP67 10 A Plastic - - - Snap - - - -
Nouveau
N° de stock RS 221-2880
Référence fabricantXCKP2502P16
33,10 €
Each
Unité
Roller - 1NC/1NO IP66, IP67 10 A Plastic - - - - - - - -
Nouveau
N° de stock RS 221-2888
Référence fabricantXCKT2111G11
37,60 €
Each
Unité
Plunger - 1NC/1NO IP66, IP67 10 A Plastic - - - Snap - - - -
Nouveau
N° de stock RS 221-2043
Référence fabricantZC2JD18
81,90 €
Each
Unité
- SP 1 C/O IP65 10 A Metal 240V - - Snap Action - - - -
Nouveau
N° de stock RS 211-8477
Référence fabricantXCKJ390541H29EX
187,00 €
Each
Unité
Roller 3P 2 NC + 1 NO IP66 6 A Zamak 240V - - - - - - -
Nouveau
N° de stock RS 221-2890
Référence fabricantXCKT2111P16
37,60 €
Each
Unité
Plunger - 1NC/1NO IP66, IP67 10 A Metal - - - Snap - - - -
Nouveau
N° de stock RS 221-2881
Référence fabricantXCKP2511G11
31,50 €
Each
Unité
Plunger - 1NC/1NO IP66, IP67 10 A Plastic - - - - - - - -
Nouveau
N° de stock RS 221-2044
Référence fabricantZC2JD1H29
146,90 €
Each
Unité
- SP 1 C/O IP65 10 A Metal 240V - - Snap Action - - - -
Nouveau
N° de stock RS 221-1906
Référence fabricantXCKM3921H29EX
225,00 €
Each
Unité
Roller lever 3P 2 NC + 1 NO IP66 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 221-2900
Référence fabricantXCMD2145C12
76,50 €
Each
Unité
Roller - 1NC/1NO IP66, IP67 4 A Metal - - - Snap - - - -
Nouveau
N° de stock RS 211-8479
Référence fabricantXCMD2110L5
65,80 €
Each
Unité
Linear 2P 1 NC + 1 NO IP66, IP67, IP68 1.5 A Zamak 240V - - - - - - -
Nouveau
N° de stock RS 221-1903
Référence fabricantXCKM3902H29EX
218,60 €
Each
Unité
Roller plunger 3P 2 NC + 1 NO IP66 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 221-2060
Référence fabricantZCKJ21
107,40 €
Each
Unité
- DP 2 C/O IP66 10 A Metal 500V - - - - - - -
Nouveau
N° de stock RS 221-1889
Référence fabricantXCKD3921P16EX
171,30 €
Each
Unité
Roller lever 3P 2 NC + 1 NO IP66, IP67 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 221-2876
Référence fabricantXCKN2539P20
566,00 €
Each (In a Pack of 20)
Unité
Roller - 1NC/1NO IP66, IP67 10 A Plastic - - - - - - - -
Nouveau
N° de stock RS 221-3029
Référence fabricantZCKSD39H29
34,50 €
Each
Unité
Linear - 2NC/1NO IP66, IP67 6 A Plastic - - - Snap - - - -
Nouveau
N° de stock RS 221-1931
Référence fabricantXR2AA03K40
1.835,20 €
Each
Unité
- SP 3 C/O IP54 10 A Aluminium alloy 600V - - Snap Action - - - -
Nouveau
N° de stock RS 221-3027
Référence fabricantZCKSD31H29
45,70 €
Each
Unité
Linear - 1NC/2NO IP66, IP67 6 A Plastic - - - Snap - - - -
Nouveau
N° de stock RS 221-2882
Référence fabricantXCKP2518P16
28,60 €
Each
Unité
Roller - 1NC/1NO IP66, IP67 10 A Plastic - - - - - - - -
Nouveau
N° de stock RS 221-2891
Référence fabricantXCKT2118G11
37,30 €
Each
Unité
Roller - 1NC/1NO IP66, IP67 10 A Plastic - - - Snap - - - -