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. 539-319
Fabrikantnummer83106022
FabrikantCrouzet
12,74 €
Each
Aantal stuks
Plunger SPDT NO/NC - 17.5 A Polyamide 250V - - - - Quick Connect 19mm 32mm
RS-stocknr. 808-7636
FabrikantnummerGLLA01A1B
FabrikantHoneywell
18,42 €
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Aantal stuks
Rotary Lever SPDT NO/NC IP66 10 A Plastic 300V 250V 1/2 in Conduit Snap Action GLL - 30.5mm 62mm
RS-stocknr. 447-3430
FabrikantnummerXCKP2121P16
29,70 €
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Aantal stuks
Plunger DP NO/NC IP66, IP67 10 A Plastic 240V 250V Cable Snap Action OsiSense XC Screw Clamp 65mm 31mm
RS-stocknr. 808-7648
FabrikantnummerGLLA01A2B
FabrikantHoneywell
15,60 €
Each
Aantal stuks
Rotary Lever SPDT NO/NC IP66 10 A Plastic 300V 250V 1/2 in Conduit Snap Action GLL - 30.5mm 62mm
RS-stocknr. 753-0003
FabrikantnummerD4MC-5020
FabrikantOmron
33,91 €
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Aantal stuks
Roller Plunger SPDT NO/NC IP67 3 A ac, 250 mA dc - 480V 250V Screw Snap Action - Screw 70mm 47mm
RS-stocknr. 808-2577
Fabrikantnummer914CE1-3A
FabrikantHoneywell
61,97 €
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Aantal stuks
Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE Wire Lead 40mm 16mm
RS-stocknr. 894-3324
FabrikantnummerNGCMB10AX01L
FabrikantHoneywell
29,72 €
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Roller Plunger SPDT NO/NC IP67 6 A Metal 240V - M12 Positive Break, Snap Action NGC Cable 30mm 16.7mm
RS-stocknr. 691-7216
FabrikantnummerBZ-2RW84-A2
FabrikantHoneywell
15,09 €
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Aantal stuks
Lever SPDT - - 15 A Plastic 125V - - Snap Action BZ Screw 28.19mm 1.94in
RS-stocknr. 386-0423
FabrikantnummerZ-15GW2BOMI
FabrikantOmron
9,26 €
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Aantal stuks
Roller Lever SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 39.4mm 49.2mm
RS-stocknr. 308-1816
FabrikantnummerGLCB01C
FabrikantHoneywell
45,75 €
Each
Aantal stuks
Roller 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. 447-3474
FabrikantnummerXCKD2102P16
35,10 €
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Aantal stuks
Plunger DP NO/NC - 3 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS-stocknr. 360-8584
FabrikantnummerZCKM1
27,90 €
Each
Aantal stuks
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 64mm 58.5mm
RS-stocknr. 700-4169
FabrikantnummerXCKP2106G11
30,90 €
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Aantal stuks
Coil Spring DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS-stocknr. 684-2908
Fabrikantnummer3SE5112-0CH01
FabrikantSiemens
54,99 €
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Aantal stuks
Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119.5mm 37.3mm
RS-stocknr. 873-2244
Fabrikantnummer440P-MSRS11B
49,11 €
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Aantal stuks
Spring Rod SPST NO/NC IP66 - Metal - - M20 - 440P - 211mm 40mm
RS-stocknr. 360-8455
FabrikantnummerZCKJ1
36,80 €
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Aantal stuks
- DP NO/NC IP65 10 A Metal 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS-stocknr. 539-343
Fabrikantnummer83871101
FabrikantCrouzet
50,94 €
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Aantal stuks
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 69.9mm 30mm
RS-stocknr. 700-4309
FabrikantnummerXCKJ10541H29
65,20 €
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Aantal stuks
Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS-stocknr. 447-3452
FabrikantnummerXCKP2145P16
34,90 €
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Aantal stuks
Lever DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS-stocknr. 410-6994
FabrikantnummerC2-SU1Z ST.
FabrikantBernstein AG
17,91 €
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Plunger - NO/NC IP20 - Fibreglass - - Screw - C2 - 44mm 26mm