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DOM specialist retailers

DOM Sigma Plus

Security can be so inexpensive


  • High security. Up to 19x locking authorisation queries per key make it almost impossible to break down the cylinder. 6 solid pin tumblers and lateral security pins prevent unauthorised opening with copied keys.
  • High level of convenience: Easy handling of the key thanks to the ergonomically shaped bow.


Double cylinder with key

Half cylinder

Knob cylinder

Modular cylinder


Technical Specifications
Areas of use


Locking system
The Sigma Plus system is the brand-name locking system for everyone who appreciates high value and security, without losing sight of costs. Whether a new building or refurbishment, the facility needs to be well protected. With excellent drilling and pulling protection (optional) values, Sigma Plus gives you a system that is almost unique in this price class.

Security features 
The extensive product range is optionally available in a high-security, modular design, and offers exemplary flexibility.  In addition, the Sigma Plus system can be combined with DOM brand electronic access technology to extend your deployment and use options for potential future applications.

Technical Specifications

  • Trademark protected locking system
  • Corrosion-free and wear-resistant nickel silver keys
  • 6 tumblers made of special brass/steel-hardened guarantee tamper protection to prevent smart opening methods and provide impact protection
  • Security pins as check points for the key authorisation request

Areas of use

  • Public buildings
  • Medium to large businesses
  • Residential complexes