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 Stock No. 859-3147
Mfr. Part No.PS21L-NS11PR-M00
HK$244.14
Each
units
Roller Plunger SPDT NO/NC IP66 2.8 A @ 24 V dc, 10 A @ 24 V ac Zinc 24V 24V 1/2 in NPT Snap Action - - 30.3mm -
RS Stock No. 822-5608
Mfr. Part No.Z-15GW2277-B7-K
BrandOmron
HK$128.12
Each
units
Roller Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V M4 Snap Action - Screw 49.2mm 29.4mm
RS Stock No. 478-1393
Mfr. Part No.LSM-11S
BrandEaton
HK$210.61
Each
units
Plunger - NO/NC IP66, IP67 6 A Metal 415V 220V Cage Clamp Snap Action LS-Titan Screw 76mm 33.5mm
RS Stock No. 539-319
Mfr. Part No.83106022
BrandCrouzet
HK$207.80
Each
units
Plunger SPDT NO/NC - 17.5 A Polyamide 250V - - - - Quick Connect 19mm 32mm
RS Stock No. 243-780
Mfr. Part No.XCKS102H29
HK$369.95
Each
units
Plunger DP NO/NC IP65 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
RS Stock No. 808-6857
Mfr. Part No.201LS1
BrandHoneywell
HK$1,324.70
Each
units
Roller Lever SPDT NO/NC - 10 A Die Cast Zinc 480V 550V 1/2 in NPT Conduit Snap Action - Plug In 48.8mm 28.2mm
RS Stock No. 418-6114
Mfr. Part No.XESP2051
HK$108.36
Each
units
- - - - 10 A - 600V - - - OsiSense XC - - -
RS Stock No. 752-9615
Mfr. Part No.HL-5050G
BrandOmron
HK$380.92
Each
units
Coil Spring SPST NO/NC IP65 5 A ac, 400 mA dc - 250V 250V Screw Snap Action - Screw - -
RS Stock No. 843-1275
Mfr. Part No.AT0-11-S-IA
BrandEaton
HK$372.70
Each
units
Plunger - NO/NC IP65 10 A Plastic 415V 220V - Slow Action AT0 Screw - -
RS Stock No. 828-1014
Mfr. Part No.WL-CA2GN
BrandOmron
HK$447.59
Each
units
Roller Lever DPDT NO/NC IP67 2 A Aluminium Alloy, Stainless Steel 250V 48V G1/2 Conduit Double Break WL Screw 125mm 40mm
RS Stock No. 902-6896
BrandRS PRO
HK$152.10
Each
units
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172.5mm
RS Stock No. 308-1888
Mfr. Part No.GLDB01A1A
BrandHoneywell
HK$251.43
Each
units
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. 700-4210
Mfr. Part No.ZCKM5
HK$242.25
Each
units
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Slow Action OsiSense XC Wire Lead 64mm 58.5mm
RS Stock No. 386-0366
Mfr. Part No.Z15GQ22B
BrandOmron
HK$126.94
Each
units
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 58.9mm 49.2mm
RS Stock No. 808-3094
Mfr. Part No.GLAA01A2A
BrandHoneywell
HK$754.59
Each
units
Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V 1/2 in NPT Conduit Snap Action GLA Wire Lead 42mm 42mm
RS Stock No. 808-7632
Mfr. Part No.EXD-Q-3
BrandHoneywell
HK$2,355.99
Each
units
Plunger DPDT 2NO/2NC - 10 A Aluminium 250V 250V - Snap Action - Wire Lead 92.96mm 65.02mm
RS Stock No. 808-7698
Mfr. Part No.SL1-EK
BrandHoneywell
HK$1,084.59
Each
units
Roller Plunger SPDT NO/NC IP67 100 mA Die Cast Zinc 125V 30V Cable Snap Action SL1 Screw 18mm 59.8mm
RS Stock No. 362-3173
Mfr. Part No.14CE2-1H
BrandHoneywell
HK$664.07
Each
units
Plunger - NO/NC IP65 3 A - 240V 1500V - - 14CE Wire Lead 49mm 40mm
RS Stock No. 186-8150
Mfr. Part No.GLAC20A1B
BrandHoneywell
HK$723.49
Each
units
Rotary Lever DPDT 2NO/2NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action GLA 20 mm Conduit 145.8mm 42mm
RS Stock No. 822-5614
Mfr. Part No.Z-15GW2-B7-K
BrandOmron
HK$140.62
Each
units
Roller Lever SPDT NO/NC IP00 15 A Thermosetting Resin 500V 250V M4 Snap Action - Screw 49.2mm 29.4mm
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