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Sigma 2 Self Contained Breathing Apparatus (SCBA)

The Sigma 2 is a self contained first breathe activated positive pressure breathing apparatus designed to offer the highest level of performance in a simple, easy to use package, to meet the needs of industry and marine markets that require both advanced capabilities and true operational simplicity.

The Scott® Sigma 2 is a SCBA set giving the same high levels of respiratory protection as the Contour, but has been packaged to provide a simple and effective solution for use in industry, shipping and other non-fire fighting environments.

Sigma 2 is a high performance, low cost self contained breathing apparatus that complies with the requirements of SOLAS chapter II reg 17.

All breathing apparatus components are designed to be user serviceable, requiring the minimum of specialist skills and equipment.


  • Low cost, high performance SCBA
  • Accepts a wide range of 200/300 bar cylinders
  • Easy to operate with low through-life costs
  • Lightweight and ergonomic backplate
  • Tempest demand valve and reducer provide excellent flow performance
  • Molded composite back plate with fully adjustable harness and infinitely adjustable
  • Kevlar webbing cylinder band
  • Fully adjustable harness is fabricated from flame retardant polyester webbing.

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