Guardmaster 440N Non Contact Switch
Usually Ships in 6 to 8 Days
Manufacturer Allen-Bradley
Mfg Catalog # 440N-H02047
OneSource Part # 4503050
Our Guardmaster Explosion-Proof Switches have sealed flameproof contact blocks, making them suitable for use in European Zone 1 and Zone 2 hazardous environments. They retain the safety features and operating principles of the conventional GuardmasterĀ® switches. All the Guardmaster Ex switches conform to the exacting standards required by the European harmonized standards.


  • For use in potentially explosive atmospheres
  • Positive mode action, flameproof contact block
  • Suitable for use in European Zone 1 and 2 environments
  • Conforms to EN 60079 and IEC 60079


  • II2G EExd IIC T6 or T5 II2D T80°C IP66 under ATEX
  • Flameproof, for use in surface industries, suitable for group IIC gases

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Product Family Selection

The 440 Ex Range family of safety switches are specifically designed for potentially explosive atmospheres. They incorporate housing construction and sealed flameproof contact blocks that conform to:
EX FerroGuard GS2 Stainless Steel Explosion proof magnetically actuated non-contact safety interlock switch
Magnetically Actuated, Noncontact
1 Normally Closed
3 Meter Cable (9.8 ft)

Supplementary Documents


  • 937T Isolated Barriers and 937C Converter Barriers937T Isolated Barriers and 937C Converter Barriers
  • 937Z Zener Barriers937Z Zener Barriers
  • 440E-A17106440E-A17106
  • 440E-A17129440E-A17129
  • 440E-A17107440E-A17107
  • 440E-A17095440E-A17095
  • 440E-A17140440E-A17140
  • 440E-A14739440E-A14739
  • 440E-A17032440E-A17032
  • 440E-A17112440E-A17112
  • 440E-A17026440E-A17026
  • 440E-A17027440E-A17027
  • 440E-A14740440E-A14740
  • 440E-A17028440E-A17028
  • 440E-A17105440E-A17105

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