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. 760-5722
FabrikantRS PRO
97,03 €
Each
Aantal stuks
- - NO/NC IP67 - Aluminium - - M20 - - Terminal Strip 112mm 88mm
RS-stocknr. 902-6862
FabrikantRS PRO
13,03 €
Each
Aantal stuks
Plunger DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 73mm
RS-stocknr. 902-6903
FabrikantRS PRO
22,20 €
Each
Aantal stuks
Coil Spring DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172mm
RS-stocknr. 902-6856
FabrikantRS PRO
16,00 €
Each
Aantal stuks
Roller Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 106mm
RS-stocknr. 902-6880
FabrikantRS PRO
18,24 €
Each
Aantal stuks
Adjustable Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 230.5mm
RS-stocknr. 902-6938
FabrikantRS PRO
31,71 €
Each
Aantal stuks
Plunger DPST NO/NC IP67 5 A Die Cast Zinc Alloy, Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 74mm
RS-stocknr. 902-6916
FabrikantRS PRO
25,82 €
Each
Aantal stuks
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 232.5mm
RS-stocknr. 902-6947
FabrikantRS PRO
31,61 €
Each
Aantal stuks
Roller Plunger DPST NO/NC IP67 5 A Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 70mm
RS-stocknr. 153-3970
FabrikantRS PRO
34,93 €
Each
Aantal stuks
Roller Lever DPST NO/NC IP66 10 A Metal 400V 250V M12 Snap Action - Screw 30.3mm 46mm
RS-stocknr. 902-6878
FabrikantRS PRO
18,98 €
Each
Aantal stuks
Roller Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 106mm
RS-stocknr. 153-3971
FabrikantRS PRO
33,63 €
Each
Aantal stuks
Spring Multidirectional Actuator DPST NO/NC IP66 10 A Metal 400V 250V M12 Snap Action - Screw 30.3mm 32.5mm
RS-stocknr. 902-6871
FabrikantRS PRO
15,30 €
Each
Aantal stuks
Roller Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 92mm
RS-stocknr. 902-6893
FabrikantRS PRO
20,69 €
Each
Aantal stuks
Roller Plunger DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 86mm
RS-stocknr. 153-3968
FabrikantRS PRO
32,23 €
Each
Aantal stuks
Roller Plunger DPST NO/NC IP66 10 A Metal 400V 250V M12 Snap Action - Screw 30.3mm 32.5mm
RS-stocknr. 902-6922
FabrikantRS PRO
21,32 €
Each
Aantal stuks
Plunger DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 75mm
RS-stocknr. 902-6874
FabrikantRS PRO
15,30 €
Each
Aantal stuks
Roller Plunger DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 84mm
RS-stocknr. 902-6887
FabrikantRS PRO
19,73 €
Each
Aantal stuks
Adjustable Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 170.5mm
RS-stocknr. 902-6944
FabrikantRS PRO
27,52 €
Each
Aantal stuks
Plunger DPST NO/NC IP67 5 A Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 60mm
RS-stocknr. 902-6865
FabrikantRS PRO
16,77 €
Each
Aantal stuks
Adjustable Lever DPST NO/NC IP65 10 A Thermoplastic Fibreglass 400V 250V Cable Snap - Screw 30.3mm 170.5mm
RS-stocknr. 902-6941
FabrikantRS PRO
29,41 €
Each
Aantal stuks
Plunger DPST NO/NC IP67 5 A Thermoplastic 240V 250V Cable Snap - Wire Lead 31.5mm 74mm
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