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Rosemount™ 242 Flow Through Toroidal Conductivity Sensor
rosemount 242 toroidal conductivity sensor
Rosemount 242 toroidal conductivity sensors feature noninvasive flow through design allowing for in-line installations without any obstruction to sample flow.
These sensors are ideal for measuring conductivity in highly conductive liquids up to 2 S/cm (2,000,000 μS/cm) and for use in viscous, abrasive, or fibrous liquids.
Rosemount™ 242 Flow Through Toroidal Conductivity Sensor


Measurement Range
Conductivity Range: 100 µS/cm to 2 S/cm
1" to 2": 22 lbs. (10kg)
3" to 4": 86 lbs. (39 kg)


  • Robust measurements - insensitive to process flow rate and direction
  • Plugging resistant and suitable for liquids containing high levels of suspended solids
  • Avoid accumulation of solids with no part of the sensor protruding into the sample flow
  • Minimize down time with in-line calibrations
  • Line sizes of 1, 1.5, 2, 3, and 4 inches (25, 40, 50, 80 and 100 mm) are available with ANSI and DIN compatible flanges
  • Ensure process compatibility with a variety of liner and O-ring materials
  • Simplified wiring with integral junction box