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.

...
Read more Read less

Filters

Viewing 61 - 80 of 1057 products
Results per page
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. 447-3806
Mfr. Part No.ZCMD21
$127.24
Each
units
- DP NO/NC - 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Plug 50mm 30mm
RS Stock No. 732-2736
Mfr. Part No.XCJ126
$70.62
Each
units
Plunger SPDT NO/NC IP54 10 A - 250V - - - - Screw 55.5mm 70.5mm
RS Stock No. 447-3604
Mfr. Part No.ZCD21
$85.31
Each
units
- DP NO/NC - 1.5 A Metal 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS Stock No. 360-8562
Mfr. Part No.ZCKM1H29
$123.99
Each
units
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 64mm 58.5mm
RS Stock No. 908-3278
Mfr. Part No.WLNJ-Y-N
BrandOmron
$151.30
Each
units
Coil Spring SPST NO/NC IP67 10 A - 500V 250V M20 Snap Action WL Screw 40mm 42mm
RS Stock No. 319-764
Mfr. Part No.14CE1-1
BrandHoneywell
$146.81
Each
units
Plunger SP NO/NC IP65, IP67 5 A - 240V - - - 14CE - 49mm 40mm
RS Stock No. 732-2726
Mfr. Part No.XCJ110
$92.73
Each
units
Plunger SPDT NO/NC IP54 10 A - 250V - - - - Screw 65.8mm 70.5mm
RS Stock No. 308-1816
Mfr. Part No.GLCB01C
BrandHoneywell
$92.67
Each
units
Roller Plunger 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. 700-4324
Mfr. Part No.ZCKJ2H29
$173.89
Each
units
- DP 2NO/2NC IP65 10 A Metal 240V 250V - Snap Action OsiSense XC Screw 73mm 30mm
RS Stock No. 339-421
Mfr. Part No.14CE2-1
BrandHoneywell
$152.88
Each
units
Roller Plunger SPDT NO/NC IP66 5 A Die Cast Zinc 240V - - Snap Action 14CE Wire Lead 49mm 40mm
RS Stock No. 794-9132
Mfr. Part No.D4C-1220
BrandOmron
$200.04
Each
units
Roller Lever SPDT NO/NC IP67 4 A dc, 5 A ac - 250V 30V Screw Snap Action - Wire Lead 40mm 65mm
RS Stock No. 748-2894
Mfr. Part No.D4C-1220
BrandOmron
$219.61
Each
units
Roller Lever SPDT NO/NC IP67 4 A dc, 5 A ac Metal 250V 30V Screw Snap Action - Screw 65mm 40mm
RS Stock No. 308-1692
Mfr. Part No.GLDB01A2A
BrandHoneywell
$75.70
Each
units
Adjustable 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. 311-2263
Mfr. Part No.GLCC06A2B
BrandHoneywell
$103.49
Each
units
Adjustable Roller Lever DPST 2NC 2NC IP66 10 A Die Cast Zinc 300V 300V Internal Screw Terminal Contact Block Slow Action GLC 20 mm Conduit 68.5mm 30.5mm
RS Stock No. 243-796
Mfr. Part No.ZCKS1H29+ZCK-D06
$48.40
Each
units
Coil Spring DP NO/NC IP65 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
RS Stock No. 123-4589
Mfr. Part No.XCKW101
$159.14
Each
units
Plunger - - IP66, IP67 - Plastic - - - Snap Action OsiSense XC Screw 40mm 41.3mm
RS Stock No. 334-628
Mfr. Part No.BZE7-2RN-C
BrandHoneywell
$150.28
Each
units
Plunger - - IP65 - - - - - - - Screw - -
RS Stock No. 186-8251
Mfr. Part No.GLAC01A2B
BrandHoneywell
$160.56
Each
units
Rotary Lever SPDT NO/NC IP67 6 A Die Cast Zinc 600V 250V - Snap Action GLA 20 mm Conduit 145.8mm 42mm
RS Stock No. 235-931
Mfr. Part No.XCKJ167H29
$240.79
Each
units
Plunger SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS Stock No. 732-2748
Mfr. Part No.XCJ128
$86.09
Each
units
Plunger SPDT NO/NC IP54 10 A - 250V - - - - Screw 68mm 70.5mm
Related Products
RS M20 AP Series Limit Switches Easy to ...
Description:
RS M20 AP Series Limit Switches Easy to use electromechanical limit switches offer special qualities and purpose built detection devices with characteristics such as, presence/absence, positioning and travel limit, objects passing and counting These limit switches are made from reinforced ...
RS M20 AM F/T Series Limit Switches Easy ...
Description:
RS M20 AM F/T Series Limit Switches Easy to use electromechanical limit switches offer special qualities and purpose built detection devices with characteristics such as, presence/absence, positioning and travel limit, objects passing and counting These limit switches are made from ...
The revolutionary wireless technology from Telemecanique Sensors simplifies ...
Description:
The revolutionary wireless technology from Telemecanique Sensors simplifies machine communication where cabling is difficult, expensive, or unwanted It is the perfect way to give mobile machines more freedom of movement. The wireless and battery-less technology also drastically reduces maintenance. Simplified, ...
BZ Series Switches The BZ series of switches ...
Description:
BZ Series Switches The BZ series of switches feature a long mechanical life of up to 20,000,000 cycles at 95% survival and also have a choice of actuation, termination and operating characteristics Low operating force and differential travel Elongated mounting ...