Salt water compatible materials used in the manufacture of pressure sensors

For the pressure sensor parts in contact with salt water, what materials do we need to make sure are used in the design?

There a number of materials which are compatible with salt water / seawater and the selection of each will depend on other constraints such as pressure rating, sensor technology, size, temperature rating and bonding methods to mention a few.

Some of the materials often used are as follows:

Diaphragms

  • Ceramic Al2O3
  • Titanium
  • Hastelloy C276

Body / Pressure Ports

  • PVC
  • PVDF
  • Duplex stainless steel
  • Hastelloy C276
  • Titanium
  • CuNiFe
  • Marine Bronze CA104

Seals

  • Viton / FKM Fluoroelastomers
  • Buna N / NBR / Nitrile
  • EPDM

Cable Jacket

  • PUR Polyurethane
  • PVC
  • FEP
  • Teflon

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