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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Omschrijving Prijs 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-stocknr. 808-7446
FabrikantnummerBAF1-2RN-RH
FabrikantHoneywell
127,98 €
Each
Aantal stuks
Plunger SPDT NO/NC - 20 A Die Cast Aluminium 480V 250V 1/2 in NPT Conduit Snap Action BAF - 101.6mm 54.8mm
RS-stocknr. 814-7968
FabrikantnummerXCSM3716L2
79,10 €
Each
Aantal stuks
Roller Lever 3P NO/2NC IP66, IP67, IP68 - Metal - - Pre-Cabled - XCSM - 30mm 32.4mm
RS-stocknr. 821-1340
FabrikantnummerLSYJC1A-7N
FabrikantHoneywell
160,50 €
Each
Aantal stuks
Coil Spring SPDT NO/NC IP65, IP66, IP67 10 A Die Cast Zinc 600V 250V 0.5 in 14 NPT Conduit Snap Action HDLS Conduit 210.03mm 1.62in
RS-stocknr. 125-8471
FabrikantnummerXCMN2110L1
37,10 €
Each
Aantal stuks
Spring Return Plunger DP NO/NC IP65 6 A Plastic 240V 250V Fixed Cable Snap Action OsiSense XC Fixed Cable 30mm 16mm
RS-stocknr. 323-9330
Fabrikantnummer79210997
FabrikantCrouzet
4,25 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 136-5911
FabrikantnummerEx 14 RUV 1O/1S-5m
FabrikantSteute
122,93 €
Each
Aantal stuks
Emergency-Stop Push-Button DPST NO/NC IP65 6 A @ 250 V ac, 250 mA @ 230 V dc Glass-Fibre, Thermoplastic 250V 230V Cable Positive Break, Slow Action Ex 14 - - 1778mm
RS-stocknr. 827-9140
FabrikantnummerD4A-1116-N
FabrikantOmron
182,96 €
Each
Aantal stuks
Coil Spring SPDT NO/NC IP67 10 A - 600V 250V 1/2 in NPT Conduit Snap Action - Screw 75.5mm 42mm
Nieuw
RS-stocknr. 217-7115
Fabrikantnummer2LS1-4PG
FabrikantHoneywell
122,15 €
Each
Aantal stuks
Top Plunger DPDT 1NC 1NO IP67 10 A Zinc Die-Cast 480V ac - - Snap Action - - - -
Nieuw
RS-stocknr. 221-2909
FabrikantnummerXCMD41F0L5EX
264,40 €
Each
Aantal stuks
Plunger - 2NC/2NO IP66, IP67 6 A Metal - - - Snap - - - -
RS-stocknr. 207-1868
Fabrikantnummer14CE2-KQ
FabrikantHoneywell
57,91 €
Each
Aantal stuks
Plunger SPDT - IP65 3 A - 250V - - - 14CE Plug 49mm 40mm
RS-stocknr. 768-6248
Fabrikantnummer3SE5234-0HC05-1AC4
FabrikantSiemens
38,61 €
Each
Aantal stuks
Round Plunger - NO/NC - - Plastic - - Screw - 3SE5 - 31mm 33mm
RS-stocknr. 311-2415
FabrikantnummerGLAB01A2B
FabrikantHoneywell
90,07 €
Each
Aantal stuks
Rotary Lever SPDT NO/NC IP67 6 A Die Cast Zinc 600V 250V - Snap Action GLA PG13.5 Connector 145.8mm 42mm
RS-stocknr. 125-2415
FabrikantnummerNGCMA00NX01C
FabrikantHoneywell
28,11 €
Each
Aantal stuks
Roller Plunger SPDT NO/NC IP67 6 A @ 120 V ac, 550 mA @ 125 V dc Metal 240V 250V M12 Snap Action NGC 4-Pin M12 Male Connector 30mm 16.7mm
RS-stocknr. 776-8517
FabrikantnummerZ-15G-B
FabrikantOmron
11,07 €
Each
Aantal stuks
Plunger SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V Screw Snap Action - Screw 49.2mm 25.1mm
RS-stocknr. 700-4254
FabrikantnummerXCKP2102G11
28,50 €
Each
Aantal stuks
Plunger DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS-stocknr. 111-7889
FabrikantnummerKBB1S11
FabrikantLovato
23,92 €
Each
Aantal stuks
Roller Plunger SPST-NC, SPST-NO NO/NC IP20, IP65 10 A Polymer Thermoplastic 690V - Cable, 1/2 NPT Snap Action - Screw 30mm 85mm
RS-stocknr. 539-325
Fabrikantnummer83872301
FabrikantCrouzet
77,48 €
Each
Aantal stuks
Plunger - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 49mm 30mm
RS-stocknr. 749-7612
Fabrikantnummer3SE5122-0BB01
FabrikantSiemens
39,60 €
Each
Aantal stuks
Plunger DPST NO/NC IP66, IP67 - Metal - - Screw - 3SE5 - 85.7mm 56mm
RS-stocknr. 189-5293
Fabrikantnummer6083000243
FabrikantBernstein AG
29,87 €
Each
Aantal stuks
Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw Slow Action, Snap Action I81 - 31mm 101mm
RS-stocknr. 136-5914
FabrikantnummerEx 14 RUV-S 2O-5m
FabrikantSteute
118,85 €
Each
Aantal stuks
Emergency-Stop Push-Button DPST NO/NC IP65 6 A @ 250 V ac, 250 mA @ 230 V dc Glass-Fibre, Thermoplastic 250V 230V Cable Positive Break, Slow Action Ex 14 - - 1778mm