Rosemount Analytical Model 228 Conductivity Sensor
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  • Rugged construction
  • Max Temp;
    • PEEK: 120°C (248°F)
    • PEEK: 200°C (392°F)
    • Tefzel: 120°C (248°F)
  • Max Pressure;
    • PEEK: 295 psig
    • Tefzel: 200 psig
  • Tolerates high vibration
  • Max cable length: 200ft
  • Integral RTD

The Model 228 is a submersion-insertion type toroidal sensor. Because it measures conductivity by inducing a current, the toroids do not need to touch the sample, but can be encased in plastic. Thus, unlike metal electrode sensors, the Model 228 sensor can be used in corrosive and dirty samples. It is also ideal for measuring high conductivity liquids.

The sensor is available in glass-filled PEEK and in filled and unfilled Tefzel®. The temperature limit is 248ºF (120ºC); although a high temperature (392ºF (200ºC)) PEEK version is available. The pressure limit for PEEK body sensors is 295 psig (2135 kPa abs) and for Tefzel body sensors is 200 psig (1480 kPa abs).

Mechanical and manual retraction assemblies that allows the sensor to be removed from the process piping without shutting down the process and draining the line is also available.


Rosemount Analytical 23294-00 Extension Cable
Unshielded interconnecting cable for 1054A, 1054B, and 2054C
Rosemount Analytical 23291-01 Extension Cable
Unshielded interconnecting cable
Rosemount Analytical 23294-05 Extension Cable
Shielded interconnecting cable with additional wire
Rosemount Analytical Extension Cable
Extension cable for Model 228

Mounting Bracket

Rosemount Analytical Mounting Adapter
Mounting Adapter, 2" Insert, CPVC, 1" FNPT Conduit Connection


Please consider these optional accessories.

Rosemount Analytical Mounting Adapter
Mounting Adapter, 1 1/2" Insertion, 1" x 3/4"
Rosemount Analytical Adapter Insert
Adapter Insert, PEEK, 1 X 3/4", for 23242-02
Rosemount Analytical 23550-00 Junction Box Remote
Junction Box, Remote, without Preamplifier
Rosemount Analytical 23242-03 Mounting Adapter
Mounting Adapter, 1 1/2" Insert, 1" Conduit Connection
Rosemount Analytical O-ring
Rosemount Analytical Ball Valve
Ball valve, full port, 1 1/2 FNPT
Rosemount Analytical Tag
Stainless Steel Tag
Rosemount Analytical Valve Insertion Assembly
Rosemount Analytical TEFZEL Insert
TEFZEL Insert for PN 23242-03
Rosemount Analytical TEFZEL Insert
TEFZEL Insert for PN 23242-02
Rosemount Analytical 23277-01 Mounting Adapter
Foxboro, PEEK or TEFZEL, 5/8-11UNC
Part Number Price Available
Show Configuration
Base Price
Materials of Construction
PEEK, Standard Temperature to 120°C (248°F)
Process Connection
3/4" MPT Threads
Cable Type
Shielded cable for improved EMI/RFI protection
Cable Length
20' (6.1 m)
$833.00 1

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