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. 410-7391
Mfr. Part No.I88-SU1Z RIWK
£19.51
Each
Units
Roller Plunger 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. 410-7357
Mfr. Part No.I88-U1Z W
£15.61
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 410-7363
Mfr. Part No.I88-SU1Z W
£16.88
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 410-7379
Mfr. Part No.I88-U1Z RIWK
£18.24
Each
Units
Roller Plunger 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. 410-7436
Mfr. Part No.I88-SU1Z AH
£27.39
Each
Units
Spindle 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. 410-7408
Mfr. Part No.I88-U1Z-HW
£20.86
Each
Units
Roller Lever 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. 410-6988
Mfr. Part No.C2-U1Z R
£12.50
Each
Units
Roller Tappet Yes NO/NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-7234
Mfr. Part No.C2-U1Z ST.
£12.10
Each
Units
Plunger Yes NO/NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-7329
Mfr. Part No.I88-U1 AV
£28.74
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. 410-7414
Mfr. Part No.I88-SU1Z HW
£21.74
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. 410-6994
Mfr. Part No.C2-SU1Z ST.
£13.37
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 410-7420
Mfr. Part No.I88-U1Z AH
£26.52
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. 410-6972
Mfr. Part No.C2-SU1Z R
£13.37
Each
Units
Roller Tappet Yes NO/NC Snap IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-7111
Mfr. Part No.C2-U1Z
£11.23
Each
Units
Radius Yes NO/NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-6865
Mfr. Part No.C2-A2Z R
£14.73
Each
Units
Roller Tappet Yes 2NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-7341
Mfr. Part No.C2-SU1Z
£12.10
Each
Units
Radius Yes NO/NC Snap IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-7262
Mfr. Part No.C2-A2Z ST.
£14.25
Each
Units
Plunger Yes 2NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 136-3195
Mfr. Part No.6086835059
£34.87
Each
Units
Lever, Roller Yes 2NC - IP65 Screw Thermoplastic 1 2 M20 x 1.5 DPST I88 99mm 31 x 49 x 99 mm
RS Stock No. 136-3203
Mfr. Part No.6089117053
£32.09
Each
Units
Plunger, Roller Yes NO/NC Slow IP67 Cable Polymeric 1 2 - SPST I49 70mm 30 x 16 x 70 mm
RS Stock No. 136-3196
Mfr. Part No.6086836131
£40.04
Each
Units
Lever, Roller Yes 2NC - IP65 Screw Thermoplastic 1 2 M20 x 1.5 DPST I88 94.5mm 31 x 47 x 94.5 mm