Hydroformed Metal Bellows

Low cost, high volume metal bellows

Sigma-Netics hydroformed metal bellows are fully customizable and can be made with most materials to meet your desired cost, performance and corrosion resistance requirements.

→ Learn more about the bellows production process.


  • 100% leak check
  • Prototyping and proof of concepts available
  • Cost competitive
  • Low cost to entry
  • Large inventory of existing sizes
  • Stocking programs for Kanban releases
  • Application verification through in-house life testing and design verification testing


  • Industrial applications such as:
    • Pressure switches
    • Gauges
    • Valves
  • Pressure and temperature sensing
  • Flexible seals for vacuum interrupters and circuit breakers
  • Aneroids for altitude sensing


  • ¼ to 4in OD
  • Wall thickness as low as 0.003 inches
  • Seamless and seam welded designs
  • Multiply options
  • Materials include:
    • Brass
    • Bronze
    • Beryllium copper
    • Monel
    • Stainless steels