Safety switches and safety sensors
Safety switches and safety sensors

Equipment safety using safety switches and safety sensors

Balluff safety switches and safety sensors are designed for a variety of applications. Our safe switches and sensors protect both workers and machine alike. The safety switches and sensors offer various operating principles: Inductive for non-contact safe detection of position and end-of-travel of metallic objects, electromechanical and Magnetic/REED or RFID-based for access or position verification for protection of personnel and machines.

Universal-use standard M12 cables save time and money during installation and assembly. They also help avoid wiring errors, gain clarity and ensure reliable monitoring.

Safety sensors and switches with RFID and Magnetic/REED Technology

Balluff Magnetic/REED safety switches ensure wear-free access protection at guard doors. When used with a spacing element, you can even install these magnetically coded safety switches in a ferromagnetic environment. And transponder-coded RFID safety sensors are the answer if greater vibration resistance and tamper resistance in guard door monitoring are required.

Electronic monitoring

Direct monitoring of robot work areas and end-of-travel of metallic tool holders in industrial environments can be accomplished electronically. This is simple to do using Balluff's non-contact, inductive safety sensors because unlike traditional safety switches or RFID safety sensors no special mating component is required, and these sensors are vibration resistant.

As is the case with all Balluff safety switches and sensors, the inductive safety sensors can be directly connected to the Safety over I/O module, which bundles all signals and forwards them via an IO-Link master module to the safety controller. As a bonus, you benefit from all the advantages of an intelligent Industry 4.0 solution.

The most important benefits

  • Safety sensors and switches for a wide variety of applications
  • Rugged housing versions with LED indicator
  • Suitable for safety applications up to PLe/SIL3
  • Savings of time and money plus prevention of errors due to standardized M12 connection technology
  • Reduced installation expense and space requirements
  • Also suitable for heavy protective equipment
  • Tamper resistant
  • Insensitive to vibration and imprecise door alignment

Product families

  • Electromechanical safety switches

    For protection of people and machines

    Safety switches with a separate actuator are interlock devices which simultaneously provide personnel and machine protection. When used with a machine controller and an isolating protection device, they secure the hazardous area against access.


    • Sturdy metal housing with status display
    • Rotatable actuator head with two insertion openings
    • Plug-in M12 connection
    Electromechanical safety switches
  • Inductive safety sensors

    Safety for people and systems

    Inductive safety sensors detect end-of-travel and positions of metallic objects without contact. Unlike traditional safety switches or RFID safety sensors, they require no special mating part, only standard M12 plugs. OSSD outputs can be used to easily connect the safe sensors to any desired safety processor.


    • Detect end-of-travel and positions of metallic objects without contact
    • No special mating piece unlike traditional safety switches
    • M12 plug connection
    • OSSD outputs link to any desired safety processor
    Inductive safety sensors
  • Magnetically coded safety switches

    Ideal for monitoring guard doors

    Non-contact, magnetically-coded REED safety switches are outstanding for monitoring guard doors – especially in environments where contamination or dust is expected. The non-contact operating principle makes them insensitive to mechanical play, for example when doors settle or are imprecisely aligned. This makes the safety switches easy to install. With separate processing electronics, the safety switch can be used for applications up to PLe/SIL 3.


    • High anti-tamper protection thanks to intelligent arrangement of the reed contacts
    • Reduces risk that the safety function can be defeated
    • M12 plug connection
    • Can be installed in ferromagnetic surroundings with spacer
    Magnetically coded safety switches
  • Magnetic safety encoder systems

    Designed for safety applications

    Magnetic safety encoder systems feature a safe incremental sin/cos interface and a safe absolute SSI or BiSS C interface. This makes them ideal for safety applications (certified by TÜV Rheinland). A measuring length up to 48 m and very high repeat accuracy (< 1 µm) makes them are highly versatile.


    • Safe: Meets the requirements of DIN EN ISO 13849-1:2015 (Machine Directive, Pld), IEC 61508:2010 (Functional Safety, SIL2) and EN IEC 61800-5-2:2007 (Safety Function, SIL2)
    • Saves time: Easy to set up with no configuration necessary
    • Universal: Measuring lengths up to 48 m, selectable resolution, high system resolution to 20 µm
    • Convenient: Configuration and diagnostics functions
    Magnetic safety encoder systems
  • Transponder-coded safety sensors

    A great deal of flexibility for installation and use

    Non-contact, transponder-coded safety sensors offer tamper resistant, wear-free access security for guard doors and flaps. They are insensitive to contamination, vibration and mechanical play. These devices can be used reliably in applications up to PLe/SIL 3. Their compact size makes them easy to integrate, while an optional integrated magnetic clamp can be used to hold protection devices in position.


    • Tamper resistant, wear-free access security for guard doors/flaps
    • Insensitive to contamination, vibration and mechanical play
    • Integrated magnetic clamp for actively holding protective devices in position (Optional)
    • Applications up to PLe/SIL 3
    • Compact size for flexible integration
    Transponder coded safety sensors