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 760-5722
MarqueRS PRO
97,03 €
Each
Unité
- - NO/NC IP67 - Aluminium - - M20 - - Terminal Strip 112mm 88mm
N° de stock RS 902-6862
MarqueRS PRO
12,65 €
Each
Unité
Plunger DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 73mm
N° de stock RS 902-6903
MarqueRS PRO
21,55 €
Each
Unité
Coil Spring DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172mm
N° de stock RS 902-6938
MarqueRS PRO
30,79 €
Each
Unité
Plunger DPST NO/NC IP67 5 A Die Cast Zinc Alloy, Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 74mm
N° de stock RS 902-6916
MarqueRS PRO
25,07 €
Each
Unité
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 232.5mm
N° de stock RS 902-6856
MarqueRS PRO
15,53 €
Each
Unité
Roller Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 106mm
N° de stock RS 902-6947
MarqueRS PRO
30,69 €
Each
Unité
Roller Plunger DPST NO/NC IP67 5 A Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 70mm
N° de stock RS 902-6880
MarqueRS PRO
17,71 €
Each
Unité
Adjustable Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 230.5mm
N° de stock RS 902-6890
MarqueRS PRO
22,04 €
Each
Unité
Roller Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 108mm
N° de stock RS 902-6893
MarqueRS PRO
20,09 €
Each
Unité
Roller Plunger DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 86mm
N° de stock RS 799-8840
MarqueRS PRO
334,39 €
Each
Unité
- - - IP67 - Aluminium - - M20 - - - - -
N° de stock RS 902-6874
MarqueRS PRO
14,85 €
Each
Unité
Roller Plunger DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 84mm
N° de stock RS 902-6896
MarqueRS PRO
22,91 €
Each
Unité
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172.5mm
N° de stock RS 799-8844
MarqueRS PRO
361,62 €
Each
Unité
- - - IP67 - Aluminium - - M20 - - - - -
N° de stock RS 902-6919
MarqueRS PRO
19,53 €
Each
Unité
Roller Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 124mm
N° de stock RS 902-6878
MarqueRS PRO
18,43 €
Each
Unité
Roller Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 106mm
N° de stock RS 902-6929
MarqueRS PRO
32,92 €
Each
Unité
Roller Plunger DPST NO/NC IP67 5 A Die Cast Zinc Alloy, Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 70mm
N° de stock RS 153-3968
MarqueRS PRO
31,29 €
Each
Unité
Roller Plunger DPST NO/NC IP66 10 A Metal 400V 250V M12 Snap Action - Screw 30.3mm 32.5mm
N° de stock RS 153-3963
MarqueRS PRO
23,98 €
Each
Unité
Roller Lever DPST NO/NC IP65 10 A Plastic 400V 250V M12 Snap Action - Screw 30.3mm 30mm
N° de stock RS 902-6950
MarqueRS PRO
27,59 €
Each
Unité
Roller Lever DPST NO/NC IP67 5 A Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 92mm