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 MakeupLimit 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 TypesLimit 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. 814-7854
Mfr. Part No.XCKD2106N12
HK$813.60
Each
units
Coil Spring DPST NO/NC IP66, IP67 10 A Zamak® Zinc Alloy 240V - 1/2 NPT Conduit Snap Action OsiSense XC Wire Lead 65mm 31mm
RS Stock No. 902-6896
BrandRS PRO
HK$199.63
Each
units
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 172.5mm
RS Stock No. 691-7257
Mfr. Part No.LSA1A
BrandHoneywell
HK$1,087.77
Each
units
Rotary Lever SPDT NO/NC IP67 10 A Die Cast Zinc 600V 250V - Snap Action HDLS Conduit 106.78mm 1.62in
RS Stock No. 342-382
Mfr. Part No.WLD2-G
BrandOmron
HK$1,521.01
Each
units
Roller Lever SPDT NO/NC IP67 10 A @ 250 V ac Die Cast Aluminium 600V 250V Snap-On Snap Action WL Conduit 96.7mm 40mm
RS Stock No. 386-0366
Mfr. Part No.Z15GQ22B
BrandOmron
HK$175.42
Each
units
Plunger SPDT NO/NC IP00 15 A - 500V 250V - Snap Action - Screw 58.9mm 49.2mm
RS Stock No. 362-3230
Mfr. Part No.BX4A3K-1A
BrandHoneywell
HK$2,439.12
Each
units
Rotary Lever SPDT NO/NC IP67 10 A Aluminium 600V 250V - Snap Action BX 20 mm Conduit 146.05mm 50.8mm
RS Stock No. 908-3287
Mfr. Part No.WLCA12-Y-N
BrandOmron
HK$652.65
Each
units
Roller Lever SPST NO/NC IP67 10 A - 500V 250V M20 Snap Action WL Screw 40mm 53.2mm
RS Stock No. 235-975
Mfr. Part No.XCKM110H29
HK$779.97
Each
units
Plunger DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS Stock No. 435-0365
Mfr. Part No.ZE-NA2-2G
BrandOmron
HK$760.38
Each
units
Roller Lever SPDT NO/NC IP65 15 A - 480V 250V - Snap Action - Screw 78.9mm 86mm
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. 808-7632
Mfr. Part No.EXD-Q-3
BrandHoneywell
HK$2,821.79
Each
units
Plunger DPDT 2NO/2NC - 10 A Aluminium 250V 250V - Snap Action - Wire Lead 92.96mm 65.02mm
RS Stock No. 908-3290
Mfr. Part No.WLCA12-2Y-N
BrandOmron
HK$751.04
Each
units
Roller Lever SPST NO/NC IP67 10 A - 500V 250V M20 Snap Action WL Screw 40mm 53.2mm
RS Stock No. 230-1866
Mfr. Part No.XCKS102
HK$340.00
Each
units
Plunger DP NO/NC IP65 3 A Plastic 240V 250V - Snap Action OsiSense XC Screw 72.5mm 40mm
RS Stock No. 843-1196
Mfr. Part No.AT4/11-1/I/AR
BrandEaton
HK$750.04
Each
units
Roller Lever - NO/NC IP65 10 A Plastic 415V 220V - Slow Action AT4 Screw - -
RS Stock No. 859-3147
Mfr. Part No.PS21L-NS11PR-M00
HK$310.82
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. 295-4870
Mfr. Part No.8LS1-4C
BrandHoneywell
HK$1,085.46
Each
units
Plunger SPDT NO/NC IP67 10 A Die Cast Zinc 480V 550V - Snap Action - Conduit - -
RS Stock No. 827-9140
Mfr. Part No.D4A-1116-N
BrandOmron
HK$1,162.38
Each
units
Coil Spring SPDT NO/NC IP67 10 A - 600V 250V 1/2 in NPT Conduit Snap Action - Screw 75.5mm 42mm
RS Stock No. 808-6857
Mfr. Part No.201LS1
BrandHoneywell
HK$1,696.25
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. 902-6916
BrandRS PRO
HK$218.39
Each
units
Adjustable Lever DPST NO/NC IP66 10 A Zinc Alloy 400V 250V Cable Snap - Screw 30.3mm 232.5mm
RS Stock No. 752-9980
Mfr. Part No.D4MC-1000
BrandOmron
HK$204.43
Each
units
Lever SPDT NO/NC IP67 3 A ac, 250 mA dc - 480V 250V Screw Snap Action - Screw 70mm 48.5mm