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 186-8251
製造零件編號GLAC01A2B
BrandHoneywell
HK$915.42
單位
Rotary Lever SPDT NO/NC IP67 6 A Die Cast Zinc 600V 250V - Snap Action GLA 20 mm Conduit 145.8mm 42mm
RS庫存編號 308-1664
製造零件編號GLCB01A2A
BrandHoneywell
HK$402.76
單位
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 799-8840
BrandRS PRO
HK$2,220.80
單位
- - - IP67 - Aluminium - - M20 - - - - -
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 207-1981
製造零件編號GLBC02A4J
BrandHoneywell
HK$893.17
單位
Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action GLB 20 mm Conduit 145.8mm 42mm
RS庫存編號 186-8504
製造零件編號GLFC01A2B
BrandHoneywell
HK$956.66
單位
Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 250V 250V - Snap Action GLF 20 mm Conduit 145.8mm 42mm
RS庫存編號 799-8844
BrandRS PRO
HK$2,454.36
單位
- - - IP67 - Aluminium - - M20 - - - - -
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 808-7474
製造零件編號BXA3K
BrandHoneywell
HK$1,909.08
單位
Rotary Lever SPDT NO/NC IP67 10 A Stainless Steel 600V 250V 1/2 in NPT Conduit Snap Action BX - 156.62mm 52.32mm
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 382-9371
製造零件編號GXE51C
BrandHoneywell
HK$2,182.95
單位
Plunger SPDT NO/NC IP67 4 A Die Cast Zinc 240V - - Snap Action GXS Wire Lead 88mm 52mm
RS庫存編號 308-1822
製造零件編號GLCB01A1A
BrandHoneywell
HK$322.27
單位
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庫存編號 308-1951
製造零件編號GLCB07A2B
BrandHoneywell
HK$413.69
單位
Adjustable Roller Lever SPDT 1NO/1NC Gold Contacts NO/NC IP66 100 mA Die Cast Zinc 50V 50V Internal Screw Terminal Contact Block Snap Action GLC PG13.5 Conduit 68.5mm 30.5mm