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.

...
Voir plus Voir moins

Filtres

Afficher 1 - 20 des 123 produits
Nombre de résultats par page
Description Prix 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
N° de stock RS 776-8539
Référence fabricantZ15GQ22
MarqueOmron
19,93 €
Each
Unité
Roller Plunger SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V Solder Snap Action - PCB Pin 49.2mm 58.9mm
N° de stock RS 386-0366
Référence fabricantZ15GQ22B
MarqueOmron
20,26 €
Each
Unité
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 58.9mm 49.2mm
N° de stock RS 386-0417
Référence fabricantZ15GW22B
MarqueOmron
11,82 €
Each
Unité
Roller Lever SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 39.4mm 49.2mm
N° de stock RS 753-0003
Référence fabricantD4MC-5020
MarqueOmron
33,57 €
Each
Unité
Roller Plunger SPDT NO/NC IP67 3 A ac, 250 mA dc - 480V 250V Screw Snap Action - Screw 70mm 47mm
N° de stock RS 386-0423
Référence fabricantZ15GW2BOMI
MarqueOmron
11,82 €
Each
Unité
Roller Lever SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 39.4mm 49.2mm
N° de stock RS 435-0371
Référence fabricantZE-Q-2G
MarqueOmron
49,60 €
Each
Unité
Plunger SPDT NO/NC IP65 15 A - 480V 250V - Snap Action - Screw 63.7mm 86mm
N° de stock RS 822-5617
Référence fabricantZ-15GW22-B7-K
MarqueOmron
11,49 €
Each
Unité
Roller Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V M4 Snap Action - Screw 49.2mm 29.4mm
N° de stock RS 436-0182
Référence fabricantZ-15GQ21-B
MarqueOmron
21,35 €
Each
Unité
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 58.9mm 49.2mm
N° de stock RS 822-5614
Référence fabricantZ-15GW2-B7-K
MarqueOmron
16,58 €
Each
Unité
Roller Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V M4 Snap Action - Screw 49.2mm 29.4mm
N° de stock RS 822-5658
Référence fabricantZE-Q22-2S
MarqueOmron
77,32 €
Each
Unité
Roller Plunger SPDT NO/NC IP65 15 A @ 480 V ac, 500 mA @ 125 V dc - 480V 250V 1/2 in 14 NPSM - - Conduit 86mm 44.5mm
N° de stock RS 776-8554
Référence fabricantZ-15GW2255-B
MarqueOmron
17,44 €
Each
Unité
Roller Lever SPDT NO/NC IP62 15 A Thermosetting Resin 500V 250V Screw Snap Action - Screw 49.2mm 39.4mm
N° de stock RS 827-9099
Référence fabricantA-20GV-B
MarqueOmron
18,76 €
Each
Unité
Lever SPDT NO/NC IP00 20 A - 500V 250V Screw Snap Action - Screw 49.2mm 17.45mm
N° de stock RS 753-0012
Référence fabricantD4E-1A20N
MarqueOmron
73,55 €
Each
Unité
Roller Plunger SPDT NO/NC IP67 5 A - 125V - Screw Snap Action - Screw 57mm 32.9mm
N° de stock RS 386-0372
Référence fabricantZ15GQB
MarqueOmron
16,37 €
Each
Unité
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 47.3mm 49.2mm
N° de stock RS 435-0321
Référence fabricantZC-Q55
MarqueOmron
43,37 €
Each
Unité
Plunger SPDT NO/NC IP67 10 A - 250V 250V - Snap Action - Screw 60.2mm 70mm
N° de stock RS 822-5623
Référence fabricantZ-15GW4-B7-K
MarqueOmron
11,60 €
Each
Unité
Lever SPDT NO/NC IP00 15 A - 500V 250V M4 Snap Action - Screw 49.2mm 29.4mm
N° de stock RS 822-5588
Référence fabricantZ-15G-B7-K
MarqueOmron
9,74 €
Each
Unité
Plunger SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V M4 Snap Action - Screw 49.2mm 24.2mm
N° de stock RS 776-8560
Référence fabricantZ-15GW-B
MarqueOmron
11,28 €
Each
Unité
Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V Screw Snap Action - Screw 49.2mm 29.4mm
N° de stock RS 828-1014
Référence fabricantWL-CA2GN
MarqueOmron
94,95 €
Each
Unité
Roller Lever DPDT NO/NC IP67 2 A Aluminium Alloy, Stainless Steel 250V 48V G1/2 Conduit Double Break WL Screw 125mm 40mm
N° de stock RS 822-5471
Référence fabricantTZ-1GV2
MarqueOmron
363,10 €
Each
Unité
Roller Lever SPDT NO/NC IP00 1 A - 250V 125V M3.5 Snap Action - Screw 49.2mm 21.8mm