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 Price 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 Stock No. 240-2638
Mfr. Part No.GLEB07C
BrandHoneywell
kr 488,24
Each
Units
Plunger SPDT NO/NC IP67 100 mA Die Cast Zinc 50V 50V - Snap Action GLE PG13.5 Connector 60mm 65mm
RS Stock No. 843-1213
Mfr. Part No.062197 & AT4/11-S/I/AR
BrandEaton
kr 662,01
Each
Units
Roller Lever - NO/NC IP65 10 A Plastic 415V 220V - Quick Break AT4 Screw - -
RS Stock No. 195-1675
Mfr. Part No.XCKMR54D1H29
kr 2 729,69
Each
Units
Lever 4PST 2NC IP66 10 A Zamak 240V 250V M20 Slow Break XCKMR Screw 200mm 59mm
RS Stock No. 609-6899
Mfr. Part No.XF9D251
kr 7 834,45
Each
Units
- 4P - IP54 50 A Aluminium Alloy - - - Snap Action - Wire Lead - -
RS Stock No. 136-5911
Mfr. Part No.Ex 14 RUV 1O/1S-5m
BrandSteute
kr 1 199,57
Each
Units
Emergency-Stop Push-Button DPST NO/NC IP65 250 mA @ 230 V dc, 6 A @ 250 V ac Glass-Fibre, Thermoplastic 250V 230V Cable Positive Break, Slow Action Ex 14 - - 1778mm
RS Stock No. 311-2263
Mfr. Part No.GLCC06A2B
BrandHoneywell
kr 413,50
Each
Units
Adjustable Roller Lever DPST 2NC 2NC IP66 10 A Die Cast Zinc 300V 300V Internal Screw Terminal Contact Block Slow Action GLC 20 mm Conduit 68.5mm 30.5mm
RS Stock No. 308-1901
Mfr. Part No.GLDB01A4J
BrandHoneywell
kr 283,15
Each
Units
Adjustable Lever SPDT 1NO/1NC NO/NC IP66 10 A Plastic, Polyester 300V 300V Internal Screw Terminal Contact Block Snap Action GLD PG13.5 Conduit 68.5mm 30.5mm
RS Stock No. 821-0432
Mfr. Part No.GLBA02D
BrandHoneywell
kr 707,01
Each
Units
Roller Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V 0.5 in 14 NPT Snap Action GLB Conduit 141mm 42mm
RS Stock No. 447-3553
Mfr. Part No.XCKT2121P16
kr 344,96
Each
Units
Plunger DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 51mm 58mm
RS Stock No. 539-296
Mfr. Part No.83733327
BrandCrouzet
kr 458,72
Each
Units
Plunger SP NO/NC IP56 5 A - 250V - Cable - - Wire Lead 36mm 49mm
RS Stock No. 808-2678
Mfr. Part No.914CE2-3A
BrandHoneywell
kr 773,60
Each
Units
Roller Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE Wire Lead 40mm 16mm
RS Stock No. 311-2178
Mfr. Part No.LS3A3K-7AA
BrandHoneywell
kr 1 828,68
Each
Units
Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action HDLS PG13.5 Connector 106.7mm 41.1mm
RS Stock No. 308-1822
Mfr. Part No.GLCB01A1A
BrandHoneywell
kr 319,55
Each
Units
Roller Lever 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 Stock No. 314-996
Mfr. Part No.EX-AR
BrandHoneywell
kr 2 040,93
Each
Units
Rotary Lever - - - 20 A - - - - - - Screw 2.7mm 2.75mm
RS Stock No. 435-0321
Mfr. Part No.ZC-Q55
BrandOmron
kr 554,00
Each
Units
Plunger SPDT NO/NC IP67 10 A - 250V 250V - Snap Action - Screw 60.2mm 70mm
RS Stock No. 894-3403
Mfr. Part No.NGCPB50AX32A1A
BrandHoneywell
kr 432,37
Each
Units
Rotary Lever DPDT 2NO/2NC IP67 10 mA Plastic - 0.03V M12 Positive Break, Snap Action NGC Cable 30mm 32.5mm
RS Stock No. 223-3218
Mfr. Part No.GLAC20B
BrandHoneywell
kr 770,63
Each
Units
Plunger DPDT 2NO/2NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action GLA 20 mm Conduit 145.8mm 42mm
RS Stock No. 808-2895
Mfr. Part No.LSA2B
BrandHoneywell
kr 1 335,36
Each
Units
Rotary Lever DPDT 2NO/2NC IP65, IP66, IP67 10 A Die Cast Zinc 600V 250V 3/4 in NPT Conduit Snap Action HDLS Plug In 47.8mm 45.3mm
RS Stock No. 362-3173
Mfr. Part No.14CE2-1H
BrandHoneywell
kr 673,68
Each
Units
Plunger - NO/NC IP65 3 A - 240V 1500V - - 14CE Wire Lead 49mm 40mm
RS Stock No. 123-6420
Mfr. Part No.176889 & LS-S11-CC
BrandEaton
kr 296,11
Each
Units
Plunger SPST-NC, SPST-NO NO/NC IP65 3 A @ 24 V dc, 6 A @ 24 V ac Cold Climate Insulated Plastic 415V 220V Screw Snap Action LS-Titan - 31mm 33.5mm
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