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 81 - 100 of 1058 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. 244-749
Mfr. Part No.XCKJ10513H29
$176.72
Each
units
Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS Stock No. 732-2745
Mfr. Part No.XCJ127
$79.38
Each
units
Plunger SPDT NO/NC IP54 10 A - 250V - - - - Screw 63.5mm 70.5mm
RS Stock No. 808-2757
Mfr. Part No.BZE6-2RN
BrandHoneywell
$98.01
Each
units
Plunger SPDT NO/NC IP66 15 A Die Cast Zinc 600V 250V 1/2 NPT Snap Action BZE6 Screw 25.4mm 44.4mm
RS Stock No. 223-3202
Mfr. Part No.GLEB24D
BrandHoneywell
$154.67
Each
units
Roller Lever DPDT 2NO/2NC IP66 6 A Die Cast Zinc 300V 250V - Snap Action GLE PG13.5 Connector 99.25mm 65mm
RS Stock No. 447-3812
Mfr. Part No.ZCMD25
$90.89
Each
units
- DP NO/NC IP66, IP67 1.5 A Zinc Alloy 240V 250V - Slow Action OsiSense XC Plug 50mm 30mm
RS Stock No. 470-4403
Mfr. Part No.ZS 236-11Z
BrandSchmersal
$55.61
Each
units
Plunger - NO/NC IP67 10 A Thermoplastic 230V 24V - Snap Action - Screw 61.5mm 30mm
RS Stock No. 360-8685
Mfr. Part No.XE2SP2151
$114.44
Each
units
- DP NO/NC - 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw - -
RS Stock No. 436-0182
Mfr. Part No.Z-15GQ21-B
BrandOmron
$41.90
Each
units
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 58.9mm 49.2mm
RS Stock No. 700-4309
Mfr. Part No.XCKJ10541H29
$210.69
Each
units
Lever SPDT NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 77mm 40mm
RS Stock No. 539-218
Mfr. Part No.83873101
BrandCrouzet
$175.11
Each
units
Lever - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 76.6mm 30mm
RS Stock No. 776-8560
Mfr. Part No.Z-15GW-B
BrandOmron
$21.48
Each
units
Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V Screw Snap Action - Screw 49.2mm 29.4mm
RS Stock No. 423-5294
Mfr. Part No.Z15GK55B
BrandOmron
$44.98
Each
units
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 37.4mm 49.2mm
RS Stock No. 700-4197
Mfr. Part No.ZCP21M12
$103.93
Each
units
- DP NO/NC - 1.5 A Plastic 240V 250V - Snap Action OsiSense XC M12 Connector 65mm 31mm
RS Stock No. 478-3563
Mfr. Part No.LS4M2D
BrandHoneywell
$307.80
Each
units
Rotary Lever DPDT 2NO/2NC - 10 A Die Cast Zinc 600V 250V - Snap Action HDLS 20 mm Conduit - -
RS Stock No. 422-9463
Mfr. Part No.9007TUB4M11
$567.77
Each
units
Lever SPDT NO/NC IP66 150 A Die Cast Zinc 600V 600V - Snap Action 9007 Conduit 61.98mm 59mm
RS Stock No. 447-3452
Mfr. Part No.XCKP2145P16
$135.15
Each
units
Lever DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS Stock No. 752-8918
Mfr. Part No.XCKS141H29
$171.29
Each
units
Roller Lever DPST NO/NC IP65 10 A Plastic 240V 250V Screw Clamp Snap Action OsiSense XC Screw 72.5mm 40mm
RS Stock No. 246-3087
Mfr. Part No.14CE2-3
BrandHoneywell
$163.49
Each
units
Roller Plunger SPDT NO/NC IP66 5 A Die Cast Zinc 240V - - Snap Action 14CE Wire Lead 49mm 40mm
RS Stock No. 776-8532
Mfr. Part No.Z15GQ8B
BrandOmron
$44.54
Each
units
Plunger SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V Screw Snap Action - Screw 49.2mm 58mm
RS Stock No. 808-2713
Mfr. Part No.914CE2-Q
BrandHoneywell
$149.49
Each
units
Roller Plunger SPDT NO/NC IP66, IP67, IP68 5 A Die Cast Zinc 250V 28V Cable Snap Action 914CE M12 Connector 40mm 16mm
Related Products
Precision Limit Switches with Cable High precision limit ...
Description:
Precision Limit Switches with Cable High precision limit switch with pre-wired 3 core cable (black,brown,blue), featuring an adjustable threaded barrel fixing Thermal current (Ith) 12 AAssigned operating current (Ie) 5A at 250VMinimum operating travel of 0.2mm Temperature range -5 to ...
KB Series Limit Switches Lovato electric KB series ...
Description:
KB Series Limit Switches Lovato electric KB series limit switches have been designed to meet safety requirements whilst also providing easy wiring, simple setup, modularity and constant reliabilityThe innovative locking bayonet mechanism allows tool free removal and repositioning of the ...
This range includes transmitters and receivers which communicate ...
Description:
This range includes transmitters and receivers which communicate via 24 GHz radio transmission.There is no need to use batteries, as the radio pulse is emitted while the actuator moves.Operation is therefore one-way towards the receiver.The Osi Sense XCKW offer can ...
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, ...