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.

...
顯示內容 隱藏內容

篩選條件

正在檢視 41 - 60,共 1030 項產品
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庫存編號 480-9097
製造零件編號AZ7310CEJ
BrandPanasonic
HK$128.07
單位
Plunger SPDT NO/NC IP64 10 A - 250V 115V - - AZ7 Screw 63.8mm 70.5mm
RS庫存編號 843-1213
製造零件編號AT4/11-S/I/AR
BrandEaton
HK$662.84
單位
Roller Lever - NO/NC IP65 10 A Plastic 415V 220V - Quick Break AT4 Screw - -
RS庫存編號 396-2541
製造零件編號GXA51C
BrandHoneywell
HK$1,855.15
單位
Plunger SPDT NO/NC IP66, IP67 4 A Die Cast Zinc 250V - - Snap Action GXA Wire Lead 102.9mm 42mm
RS庫存編號 283-656
製造零件編號XCMD2111L1
HK$362.26
單位
Plunger DP NO/NC IP66, IP67, IP68 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 50mm 30mm
RS庫存編號 360-8584
製造零件編號ZCKM1
HK$214.70
單位
- DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Wire Lead 64mm 58.5mm
RS庫存編號 339-421
製造零件編號14CE2-1
BrandHoneywell
HK$596.95
單位
Roller Plunger SPDT NO/NC IP66 5 A Die Cast Zinc 240V - - Snap Action 14CE Wire Lead 49mm 40mm
RS庫存編號 246-3087
製造零件編號14CE2-3
BrandHoneywell
HK$694.08
單位
Roller Plunger SPDT NO/NC IP66 5 A Die Cast Zinc 240V - - Snap Action 14CE Wire Lead 49mm 40mm
RS庫存編號 828-1027
製造零件編號WL-CA12-GN
BrandOmron
HK$534.78
單位
Adjustable Roller Lever DPST NO/NC IP67 2 A Aluminium Alloy, Stainless Steel 250V 48V G1/2 Conduit Double Break WL Screw 94.1mm 40mm
RS庫存編號 235-997
製造零件編號XCKM121H29
HK$375.34
單位
Plunger DP NO/NC IP66 10 A Zinc Alloy 240V 250V - Snap Action OsiSense XC Screw 64mm 63mm
RS庫存編號 308-1901
製造零件編號GLDB01A4J
BrandHoneywell
HK$275.19
單位
Adjustable 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庫存編號 311-2263
製造零件編號GLCC06A2B
BrandHoneywell
HK$445.02
單位
Adjustable Roller Lever DPST 2NC 2NC IP66 10 A Die Cast Zinc 300V 300V Internal Screw Terminal Contact Block Slow Action GLC 20 mm Conduit 68.5mm 30.5mm
RS庫存編號 235-925
製造零件編號XCKJ161
HK$534.96
單位
Plunger SPDT NO/NC IP66 10 A Metal 600V 600V - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 609-3430
製造零件編號ZC2JC1
HK$555.74
單位
- SP NO/NC IP65 10 A Metal 240V - - Snap Action OsiSense XC Screw 77mm 40mm
RS庫存編號 609-6619
製造零件編號XCKP2106P16
HK$234.79
單位
Coil Spring DP NO/NC IP66, IP67 10 A Plastic 240V 250V - Snap Action OsiSense XC Screw 65mm 31mm
RS庫存編號 311-2112
製造零件編號1LS244-4C
BrandHoneywell
HK$1,441.12
單位
Rotary Lever - - IP67 10 A - 480V 550V - Snap Action - 20 mm Conduit 111.4mm 40mm
RS庫存編號 435-0343
製造零件編號ZC-Q2255
BrandOmron
HK$289.52
單位
Plunger SPDT NO/NC IP67 10 A - 250V 250V - Snap Action - Screw 69.4mm 70mm
RS庫存編號 609-6625
製造零件編號XCMD2102C12
HK$584.73
單位
Roller Plunger DP NO/NC IP66, IP67, IP68 1.5 A Zinc Alloy 240V 250V - Snap Action OsiSense XC M12 Connector 50mm 30mm
RS庫存編號 700-4197
製造零件編號ZCP21M12
HK$225.93
單位
- DP NO/NC - 1.5 A Plastic 240V 250V - Snap Action OsiSense XC M12 Connector 65mm 31mm
RS庫存編號 447-3430
製造零件編號XCKP2121P16
HK$234.79
單位
Plunger DP NO/NC IP66, IP67 10 A Plastic 240V 250V Cable Snap Action OsiSense XC Screw Clamp 65mm 31mm
RS庫存編號 908-3269
製造零件編號WLCA12-2NG-N
BrandOmron
HK$708.95
單位
Roller Lever SPST NO/NC IP67 10 A - 500V 250V PG 13.5 Snap Action WL Screw 40mm 53.2mm