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庫存編號 515-662
製造零件編號BZE7-2RQ8-C
BrandHoneywell
HK$1,157.44
單位
Roller Level - - IP50 - - - - - - - Screw - -
RS庫存編號 609-6552
製造零件編號XCKL115
HK$1,198.46
單位
Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 72mm 52mm
RS庫存編號 753-0012
製造零件編號D4E-1A20N
BrandOmron
HK$411.27
單位
Roller Plunger SPDT NO/NC IP67 5 A - 125V - Screw Snap Action - Screw 57mm 32.9mm
RS庫存編號 447-3402
製造零件編號XCKP2102P16
HK$510.26
單位
Plunger DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS庫存編號 814-7854
製造零件編號XCKD2106N12
HK$1,043.53
單位
Coil Spring DPST NO/NC IP66, IP67 10 A Zamak® Zinc Alloy 240V - 1/2 NPT Conduit Snap Action OsiSense XC Wire Lead 65mm 31mm
RS庫存編號 308-1901
製造零件編號GLDB01A4J
BrandHoneywell
HK$280.51
單位
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庫存編號 447-3878
製造零件編號XCMD2115L1
HK$366.58
單位
Lever DP NO/NC IP66, IP67, IP68 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 50mm 30mm
RS庫存編號 814-7839
製造零件編號XCKP2145N12
HK$934.51
單位
Roller Lever DPST NO/NC IP66, IP67 10 A Plastic 240V - 1/2 NPT Conduit Snap Action OsiSense XC Wire Lead 65mm 31mm
RS庫存編號 609-6625
製造零件編號XCMD2102C12
HK$577.88
單位
Roller Plunger DP NO/NC IP66, IP67, IP68 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC M12 Connector 50mm 30mm
RS庫存編號 311-2112
製造零件編號1LS244-4C
BrandHoneywell
HK$1,606.83
單位
Rotary Lever - - IP67 10 A - 480V 550V - Snap Action - 20 mm Conduit 111.4mm 40mm
RS庫存編號 814-7835
製造零件編號XCKP2145M12
HK$589.20
單位
Roller Lever DPST NO/NC IP66, IP67 3 A Plastic 250V - M12 Snap Action OsiSense XC 4 Pin 65mm 31mm
RS庫存編號 609-3430
製造零件編號ZC2JC1
HK$601.07
單位
- SP NO/NC IP65 10 A Metal 240V - - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 418-6079
製造零件編號XCKS159
HK$333.39
單位
Lever DP NO/NC IP65 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
RS庫存編號 244-749
製造零件編號XCKJ10513H29
HK$1,128.14
單位
Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 746-7255
製造零件編號D4N-4132
BrandOmron
HK$199.97
單位
Roller Plunger DPST NO/NC - - - - - Screw - D4N - 64mm 31mm
RS庫存編號 843-1250
製造零件編號007606 & AT0-11-1-IA
BrandEaton
HK$462.22
單位
Plunger - NO/NC IP65 10 A Plastic 415V 220V - Slow Action AT0 Screw - -
RS庫存編號 684-2908
製造零件編號3SE5112-0CH01
BrandSiemens
HK$437.69
單位
Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119.5mm 37.3mm
RS庫存編號 236-013
製造零件編號XCKM106H29
HK$342.99
單位
Coil Spring DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS庫存編號 235-925
製造零件編號XCKJ161
HK$1,041.13
單位
Plunger SPDT NO/NC IP66 10 A Metal 600V 600V - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 908-3269
製造零件編號WLCA12-2NG-N
BrandOmron
HK$791.08
單位
Roller Lever SPST NO/NC IP67 10 A - 500V 250V PG 13.5 Snap Action WL Screw 40mm 53.2mm