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Conductivity field monitor LF 298

User-friendly, analog field monitor - suitable for numerous conductivity measuring cells due to different measuring ranges and cell constants

  • For versatile applications with 7 selectabel measuring ranges
  • connection of different measuring cells possible
  • User-friendly operation thanks to clear menu structure

The LF 298 is an economical and metrologically flexible solution for use in the field. Thanks to its integrated lightning protection, the fail rate by secondary lightning effects is minimized. Galvanically isolated outputs are just as much standard as a complete function monitoring of the monitor and the connected sensor.


Model Description Order no.
LF 298 NTC Conductivity field monitor with 2 power outputs an MODBUS interface, with automatic temperature compensation (NTC), 230 VAC 391230
LF 298 Pt1000 Like the LF 298, but with Pt1000 391234

Technical Data

Connectable measuring cells 2 or 4 electrode measuring cells
Measuring ranges (cell constant) 0 ... 2 µS/cm (2 electrode measuring cells);
0 ... 20 µS/cm (2 electrode measuring cells);
0 ... 200 µS/cm (2 electrode measuring cells);
0 ... 200 µS/cm (4 electrode measuring cells);
0 ... 2 mS/cm (4 electrode measuring cells);
0 ... 20 mS/cm (4 electrode measuring cells);
0 ... 500 mS/cm (4 electrode measuring cells)
Temperature measurement NTC or Pt1000 (integrated in sensor)
Temperatur compensation -10 °C ... +130 °C
Analog outputs 2 x 0(4) … 20 mA
2 x Relays
Housing Aluminium housing for wall mounting, protection IP 65
Dimensions 160 x 130 x 70 mm (WxHxD)
Power supply 100 … 240 V AC
or 18 … 36 V DC

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