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Rosemount™ 228 Toroidal Conductivity Sensor
rosemount 228 toroidal conductivity sensor
Toroidal sensors work well in highly conductive liquids, up to about 2 S/cm (2,000,000 uS/cm).
These sensors work in dirty and corrosive applications where metal electrode sensors would otherwise fail. A robust sensor design makes the Rosemount 228 ideal for meausring concentrations of acid, base, and salt solutions.
Rosemount™ 228 Toroidal Conductivity Sensor


Process Connection
1-1/2 in. MNPT
Valve Type
Recommended Valve: 1-1/2 in. full port ball valve
Materials of Construction
316 Stainless Steel, Teflon1, Ethylene Polypropylene


  • Meet challenging application requirements with a selection of chemical resistant body options including PEEK and Tefzel
  • High vibration tolerance with reinforced internal metal frame design
  • High temperature option for process temperatures up to 200°C (392°F) and suitable for use under high pressure up to 295 psi (2135 kPa [abs])
  • Suitable for insertion and submersion type applications
  • Versatile mounting options featuring either a 3/4" MNPT or 5/8" 11 UNC process connection
  • Eliminate the need to have to shut down your process when removing sensors from piping and tanks by using an optional retraction assembly kit