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 539-286
製造零件編號83870101
BrandCrouzet
HK$411.06
單位
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 69.9mm 30mm
RS庫存編號 539-319
製造零件編號83106022
BrandCrouzet
HK$207.80
單位
Plunger SPDT NO/NC - 17.5 A Polyamide 250V - - - - Quick Connect 19mm 32mm
RS庫存編號 539-218
製造零件編號83873101
BrandCrouzet
HK$475.79
單位
Lever - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 76.6mm 30mm
RS庫存編號 539-220
製造零件編號83118010
BrandCrouzet
HK$270.22
單位
Plunger SP NO/NC - - - - - Screw - - - - -
RS庫存編號 539-236
製造零件編號83139103
BrandCrouzet
HK$353.18
單位
Plunger SPDT - - - - - - - - - Wire Lead - -
RS庫存編號 539-252
製造零件編號83118015
BrandCrouzet
HK$316.96
單位
Plunger SP NO/NC - - - - - Screw - - - - -
RS庫存編號 323-9267
製造零件編號83 581 101
BrandCrouzet
HK$514.67
單位
- - - - - - - - - - - - - -
RS庫存編號 539-343
製造零件編號83871101
BrandCrouzet
HK$439.11
單位
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 69.9mm 30mm
RS庫存編號 323-9295
製造零件編號83840701
BrandCrouzet
HK$594.59
單位
- - - - - - - - - - - - - -
RS庫存編號 539-315
製造零件編號83731324
BrandCrouzet
HK$548.55
單位
Plunger SP NO/NC IP66 5 A - 250V - Cable - - Wire Lead 49.5mm 49mm
RS庫存編號 323-9330
製造零件編號79210997
BrandCrouzet
HK$41.69
單位
- - - - - - - - - - - - - -
RS庫存編號 323-9239
製造零件編號83 581 001
BrandCrouzet
HK$382.17
單位
- - - - - - - - - - - - - -
RS庫存編號 539-274
製造零件編號83106030
BrandCrouzet
HK$235.00
單位
Plunger SPDT NO/NC - 17.5 A Polyamide 250V - - - - Solder Tag 19mm 32mm
RS庫存編號 539-270
製造零件編號83873301
BrandCrouzet
HK$605.00
單位
Lever - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 85.6mm 30mm
RS庫存編號 539-268
製造零件編號83228001
BrandCrouzet
HK$586.26
單位
Plunger SP NO/NC - 10 A Polyamide 250V - Solder Pin - - - 7.5mm -
RS庫存編號 539-296
製造零件編號83733327
BrandCrouzet
HK$475.93
單位
Plunger SP NO/NC IP56 5 A - 250V - Cable - - Wire Lead 36mm 49mm
RS庫存編號 539-242
製造零件編號83118009
BrandCrouzet
HK$341.01
單位
Lever SP NO/NC - - - - - - - - - - -
RS庫存編號 539-347
製造零件編號83151012
BrandCrouzet
HK$1,702.86
單位
Plunger SP NO/NC - - - - - - - - Solder Tag - -
RS庫存編號 539-246
製造零件編號83870301
BrandCrouzet
HK$533.50
單位
Plunger - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 59.8mm 30mm
RS庫存編號 323-9324
製造零件編號83845701
BrandCrouzet
HK$991.06
單位
- - - - - - - - - - - - - -