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. 179-7561
BrandRS PRO
SGD41.28
Each
units
- - 2NC/NO Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7566
BrandRS PRO
SGD37.15
Each
units
Roller Arm Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 89mm 31 x 31 x 89 mm
RS Stock No. 179-7569
BrandRS PRO
SGD30.96
Each
units
Roller Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 62mm 31 x 45 x 62 mm
RS Stock No. 179-7567
BrandRS PRO
SGD27.86
Each
units
Roller Plunger Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 84.5mm 31 x 30.5 x 84.5 mm
RS Stock No. 179-7568
BrandRS PRO
SGD27.86
Each
units
Plunger Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 74.5mm 31 x 31 x 74.5 mm
RS Stock No. 179-7562
BrandRS PRO
SGD41.28
Each
units
- - 2NC Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7563
BrandRS PRO
SGD41.28
Each
units
- - NO/NC Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7565
BrandRS PRO
SGD37.15
Each
units
Cat Whisker Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 172mm 31 x 31 x 172 mm
RS Stock No. 179-7570
BrandRS PRO
SGD30.96
Each
units
Roller Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 107mm 31 x 47.5 x 107 mm
RS Stock No. 202-3847
Mfr. Part No.GHG2610005R0005
BrandCEAG
SGD285.54
Each
units
- - NO/2NC - - Screw Polyamide 2 3 M20 3P - 112mm 102 x 84 x 112 mm
RS Stock No. 274-7997
Mfr. Part No.GHG2632301R0007
BrandCEAG
SGD931.33
Each
units
- - NO/NC - - Screw Polyamide 2 2 M25 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 621-1543
Mfr. Part No.D4N-1132
BrandOmron
SGD32.64
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. 274-7981
Mfr. Part No.GHG2622301R0007
BrandCEAG
SGD661.07
Each
units
- - NO/NC - - Screw Polyamide 2 2 M20 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 258-8091
Mfr. Part No.GSAC01C
BrandHoneywell
SGD179.63
Each
units
Plunger Yes NO/NC Snap - Screw Metal - 2 M20 x 1.5 DP GSS 42mm 141 x 42 x 42 mm
RS Stock No. 410-7414
Mfr. Part No.I88-SU1Z HW
SGD50.06
Each
units
Roller Lever Yes NO/NC Snap IP65 Screw Fibreglass 1 2 M20 x 1.5 - I88 SU/U 30.5mm 62 x 22 x 30.5 mm
RS Stock No. 749-7599
Mfr. Part No.3SE5112-0CH50
BrandSiemens
SGD81.12
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. 755-7847
Mfr. Part No.3SE5413-0CC20-1EA5
BrandSiemens
SGD76.98
Each
units
Round Plunger Yes NO/NC Snap - Cable - - 2 5 x 0.75 mm² DPST 3SE5 16.2mm 50 x 30 x 16.2 mm
RS Stock No. 410-7363
Mfr. Part No.I88-SU1Z W
SGD33.71
Each
units
Radius Yes NO/NC Snap IP65 Screw Fibreglass 1 2 M20 x 1.5 - I88 SU/U 30.5mm 62 x 22 x 30.5 mm
RS Stock No. 621-1515
Mfr. Part No.D4N-1120
BrandOmron
SGD36.53
Each
units
Roller Lever Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 47mm 73 x 31 x 47 mm
RS Stock No. 836-2747
Mfr. Part No.D4N1A62
BrandOmron
SGD46.51
Each
units
One Way Roller Arm Lever Yes NO/NC Slow IP67 Screw - 1 2 PG13.5 DPST D4N 92mm 31 x 31.5 x 92 mm
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