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 609-6675
製造零件編號XCRF17
HK$1,906.58
單位
Lever 4P 2NO/2NC IP54 3 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 95mm 85mm
RS庫存編號 360-8562
製造零件編號ZCKM1H29
HK$204.90
單位
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 64mm 58.5mm
RS庫存編號 235-931
製造零件編號XCKJ167H29
HK$661.19
單位
Plunger SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 447-3418
製造零件編號XCKP2110P16
HK$187.73
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 700-4245
製造零件編號XCKM102
HK$360.28
單位
Plunger DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS庫存編號 447-3395
製造零件編號XCKP2118P16
HK$190.01
單位
Lever DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS庫存編號 447-3840
製造零件編號XCMD2102L1
HK$482.90
單位
Plunger 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 700-4309
製造零件編號XCKJ10541H29
HK$754.00
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 235-953
製造零件編號XCKJ10541
HK$696.61
單位
Lever SPDT NO/NC IP66 10 A Metal 600V 600V - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 700-4295
製造零件編號ZCT25P16
HK$171.90
單位
- DP NO/NC IP66, IP67 1.5 A Plastic 240V 250V - Slow Action OsiSense XC Screw 51mm 58mm
RS庫存編號 447-3452
製造零件編號XCKP2145P16
HK$223.92
單位
Lever DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS庫存編號 700-4305
製造零件編號XCKJ10511H29
HK$691.60
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 280-8799
製造零件編號XCKM106
HK$401.18
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 447-3806
製造零件編號ZCMD21
HK$281.14
單位
- DP NO/NC - 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Plug 50mm 30mm
RS庫存編號 199-282
製造零件編號XC2JC10111
HK$1,102.00
單位
Rotary Lever - - IP65 10 A Metal 240V - - Snap Action OsiSense XC Wire Lead 81mm 41mm
RS庫存編號 236-007
製造零件編號XCKM115H29
HK$326.10
單位
Lever DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS庫存編號 360-8584
製造零件編號ZCKM1
HK$245.18
單位
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 64mm 58.5mm
RS庫存編號 283-656
製造零件編號XCMD2111L1
HK$362.26
單位
Plunger 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 447-3575
製造零件編號ZCP21
HK$118.51
單位
- DP NO/NC - 1.5 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS庫存編號 609-6552
製造零件編號XCKL115
HK$471.77
單位
Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 72mm 52mm