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. 179-7565
BrandRS PRO
£18.54
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
£15.45
Each
Units
Roller Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 107mm 31 x 47.5 x 107 mm
RS Stock No. 179-7566
BrandRS PRO
£18.54
Each
Units
Roller Arm Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 89mm 31 x 31 x 89 mm
RS Stock No. 179-7567
BrandRS PRO
£13.91
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. 179-7561
BrandRS PRO
£20.60
Each
Units
- - 2NC/NO Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7568
BrandRS PRO
£13.91
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
£20.60
Each
Units
- - 2NC Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7569
BrandRS PRO
£15.45
Each
Units
Roller Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 62mm 31 x 45 x 62 mm
RS Stock No. 179-7563
BrandRS PRO
£20.60
Each
Units
- - NO/NC Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 498-5567
Mfr. Part No.440P-MTAS11B
£34.20
Each
Units
Telescope Arm Yes NO/NC Snap - - Metal - 2 M20 - 440P 43mm 71 x 40 x 43 mm
RS Stock No. 323-511
Mfr. Part No.440P-M18001
£14.30
Each
Units
Roller Yes NO/NC Slow IP30 Screw PBT - 2 - - 440P 23.3mm 54 x 25 x 23.3 mm
RS Stock No. 873-2238
Mfr. Part No.440P-MRPB22B
£40.10
Each
Units
Roller Plunger Yes 2NO/NC Slow IP66 M20 Metal - 4 - 4PST 440P 43mm 118 x 40 x 43 mm
RS Stock No. 621-1521
Mfr. Part No.D4N-112G
BrandOmron
£25.10
Each
Units
Roller Lever Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 45mm 73 x 31 x 45 mm
RS Stock No. 621-1515
Mfr. Part No.D4N-1120
BrandOmron
£20.24
Each
Units
Roller Lever Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 47mm 73 x 31 x 47 mm
RS Stock No. 274-7981
Mfr. Part No.GHG2622301R0007
BrandCEAG
£329.89
Each
Units
- - NO/NC - - Screw Polyamide 2 2 M20 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 202-3847
Mfr. Part No.GHG2610005R0005
BrandCEAG
£246.77
Each
Units
- - NO/2NC - - Screw Polyamide 2 3 M20 3P - 112mm 102 x 84 x 112 mm
RS Stock No. 873-2235
Mfr. Part No.440P-MSLS11B
£34.20
Each
Units
Short Lever Yes NO/NC Snap IP66 M20 Metal - 2 - SPST 440P 64mm 133 x 40 x 64 mm
RS Stock No. 757-9140
Mfr. Part No.D4B4111N
BrandOmron
£44.56
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. 757-9159
Mfr. Part No.D4B4116N
BrandOmron
£53.55
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. 746-7261
Mfr. Part No.D4N-4180
BrandOmron
£23.68
Each
Units
Cat's Whisker Yes NO/NC Snap - Screw - - 2 - DPST D4N 31.5mm 64 x 31 x 31.5 mm
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