Safety Limit Switches

Limit switches operate with the movement of machinery, opening or closing the circuit when movement is detected. Safety limit switches provide a level of risk reduction over regular limit switches, as they have a positive actuation structure, which means that if a fault occurs they will stop conducting the electrical load.

What are safety limit switches used for?

Safety limit switches are used in industrial settings to reduce the risk factor in the event of overcurrent or electrical faults. This can be useful in a wide range of applications, from heating and ventilation to the operation of heavy machinery, where normal limit switches might provide a risk if they continued to conduct electricity in the event of a fault.

Types of safety limit switches

Safety limit switches mainly differ by the type of actuator they have. This can be a hinge, roller, rod or push bolt, for example.They can also vary by the number of contacts and cable entries that they have.


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Description Price Actuator Type Actuator Included Normal State Configuration Action Type IP Rating Connection Type Housing Material Number of Cable Entries Number of Contacts Size of Cable Entries Pole and Throw Configuration Series Depth Dimensions
RS Stock No. 202-3847
Mfr. Part No.GHG2610005R0005
BrandCEAG
HK$2,836.47
Each
units
- - NO/2NC - - Screw Polyamide 2 3 M20 3P - 112mm 102 x 84 x 112 mm
RS Stock No. 410-6900
Mfr. Part No.SK-A2Z M
HK$241.35
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-6922
Mfr. Part No.SKC-A1Z M
HK$212.70
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-7032
Mfr. Part No.ENM2-SU1Z IW
HK$280.37
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-6916
Mfr. Part No.SK-U1Z M
HK$214.00
Each
units
Radius Yes NO/NC Slow IP65 Screw Fibreglass 3 2 M20 x 1.5 - ENM2 33.5mm 90 x 52 x 33.5 mm
RS Stock No. 749-7640
Mfr. Part No.3SE5162-0CE01
BrandSiemens
HK$847.13
Each
units
Roller Lever Yes 2NO/2NC - IP66, IP67 Screw Metal - - - 4PST 3SE5 37mm 107.7 x 56 x 37 mm
RS Stock No. 410-6893
Mfr. Part No.ENM2-SU1Z AHS-V
HK$425.91
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-7048
Mfr. Part No.ENM2-SU1Z RIW
HK$289.05
Each
units
- - - - - - - - - - - - - -
RS Stock No. 274-7981
Mfr. Part No.GHG2622301R0007
BrandCEAG
HK$3,791.89
Each
units
- - NO/NC - - Screw Polyamide 2 2 M20 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 749-7669
Mfr. Part No.3SE5232-0HE10
BrandSiemens
HK$235.07
Each
units
Roller Lever Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 749-7650
Mfr. Part No.3SE5232-0HD03
BrandSiemens
HK$204.43
Each
units
Roller Plunger Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 749-7599
Mfr. Part No.3SE5112-0CH50
BrandSiemens
HK$465.29
Each
units
Twist Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 749-7583
Mfr. Part No.3SE5112-0CD02
BrandSiemens
HK$456.79
Each
units
Plunger Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 621-1543
Mfr. Part No.D4N-1132
BrandOmron
HK$192.85
Each
units
Roller Plunger Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 31.5mm 83.6 x 31 x 31.5 mm
RS Stock No. 768-6538
Mfr. Part No.3SE5162-0CA00
BrandSiemens
HK$701.96
Each
units
Round Plunger - 2NO/2NC Snap - Screw Metal 3 4 M20 x 1.5 - 3SE5 100mm 56 x 37 x 100 mm
RS Stock No. 746-7255
Mfr. Part No.D4N-4132
BrandOmron
HK$234.36
Each
units
Roller Plunger Yes NO/NC Snap - Screw - - 2 M20 DPST D4N 31.5mm 64 x 31 x 31.5 mm
RS Stock No. 757-9159
Mfr. Part No.D4B4116N
BrandOmron
HK$522.53
Each
units
Roller Lever Yes NO/NC Snap - Screw Metal 1 2 M20 DPST D4B-N 43mm 99.5 x 40 x 43 mm
RS Stock No. 749-7647
Mfr. Part No.3SE5132-0BA00
BrandSiemens
HK$180.87
Each
units
- - NO/NC - IP66, IP67 Screw Plastic - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 410-7420
Mfr. Part No.I88-U1Z AH
HK$303.39
Each
units
Spindle Yes NO/NC Slow IP65 Screw Fibreglass 1 2 M20 x 1.5 - I88 SU/U 30.5mm 62 x 22 x 30.5 mm
RS Stock No. 698-8779
Mfr. Part No.EX-ZS 335-11Z-3G/D
BrandSchmersal
HK$873.67
Each
units
Plunger Yes NO/NC Snap - Screw Metal 1 2 M20 x 1.5 DP EX-ZS 335 38mm 66.5 x 40.5 x 38 mm
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