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 MakeupLimit 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 TypesLimit 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. 752-9983
Mfr. Part No.D4MC-1020
BrandOmron
HK$282.81
Each
units
Lever SPDT NO/NC IP67 3 A ac, 250 mA dc - 480V 250V Screw Snap Action - Screw 70mm 48.5mm
RS Stock No. 539-286
Mfr. Part No.83870101
BrandCrouzet
HK$469.01
Each
units
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 69.9mm 30mm
RS Stock No. 902-6896
BrandRS PRO
HK$199.63
Each
units
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172.5mm
RS Stock No. 843-1257
Mfr. Part No.AT0-11-1-IA/ZS
BrandEaton
HK$570.40
Each
units
Plunger - NO/NC IP65 10 A Plastic 415V 220V - Slow Action AT0 Screw - -
RS Stock No. 308-1670
Mfr. Part No.GLCB01A9A
BrandHoneywell
HK$533.79
Each
units
Rotary 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. 843-1196
Mfr. Part No.AT4/11-1/I/AR
BrandEaton
HK$750.04
Each
units
Roller Lever - NO/NC IP65 10 A Plastic 415V 220V - Slow Action AT4 Screw - -
RS Stock No. 700-4181
Mfr. Part No.ZCT21G11
HK$151.90
Each
units
- DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw - -
RS Stock No. 435-0321
Mfr. Part No.ZC-Q55
BrandOmron
HK$648.88
Each
units
Plunger SPDT NO/NC IP67 10 A - 250V 250V - Snap Action - Screw 60.2mm 70mm
RS Stock No. 230-1850
Mfr. Part No.XCKS101
HK$311.37
Each
units
Plunger DP NO/NC IP65 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
RS Stock No. 859-3147
Mfr. Part No.PS21L-NS11PR-M00
HK$310.82
Each
units
Roller Plunger SPDT NO/NC IP66 2.8 A @ 24 V dc, 10 A @ 24 V ac Zinc 24V 24V 1/2 in NPT Snap Action - - 30.3mm -
RS Stock No. 700-4210
Mfr. Part No.ZCKM5
HK$631.51
Each
units
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Slow Action OsiSense XC Wire Lead 64mm 58.5mm
RS Stock No. 821-0441
Mfr. Part No.GLCB01A2B
BrandHoneywell
HK$368.14
Each
units
Adjustable 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. 308-1888
Mfr. Part No.GLDB01A1A
BrandHoneywell
HK$339.97
Each
units
Roller 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. 311-2128
Mfr. Part No.2LS1-4CN151
BrandHoneywell
HK$1,199.71
Each
units
Plunger - - IP67 10 A - 480V 550V - Snap Action - - 98.6mm 40mm
RS Stock No. 691-7257
Mfr. Part No.LSA1A
BrandHoneywell
HK$1,087.77
Each
units
Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action HDLS Conduit 106.78mm 1.62in
RS Stock No. 808-7698
Mfr. Part No.SL1-EK
BrandHoneywell
HK$1,199.89
Each
units
Roller Plunger SPDT NO/NC IP67 100 mA Die Cast Zinc 125V 30V Cable Snap Action SL1 Screw 18mm 59.8mm
RS Stock No. 478-1359
Mfr. Part No.LSM-02
BrandEaton
HK$254.88
Each
units
Plunger - 2NC IP66, IP67 6 A Metal 415V 220V Cage Clamp Standard Action LS-Titan Screw 76mm 33.5mm
RS Stock No. 136-5923
Mfr. Part No.Ex ES 98 -11 -40C
BrandSteute
HK$2,679.13
Each
units
Plunger DPST NO/NC IP66 4.4 (T6) A, 6.6 (T5) A Aluminium 250V 125V Cable Positive Break, Slow Action Ex 98 Screw 1016mm 2768.6mm
RS Stock No. 539-303
Mfr. Part No.83872101
BrandCrouzet
HK$604.55
Each
units
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 85mm 30mm
RS Stock No. 828-1020
Mfr. Part No.WL-CL-GN
BrandOmron
HK$1,036.41
Each
units
Adjustable Lever DPDT 1NO/2NC IP67 2 A Aluminium Alloy 250V 48V G1/2 Conduit Double Break WL Screw 94.1mm 40mm
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