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Conductivity field monitor EcoLine® LF 170

WTW analog conductivity monitors EcoLine® LF 170

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
  • 4 fixed cell constants as well as variable adjustments allow the connection of different measuring cells
  • User-friendly operation thanks to clear menu structure

The EcoLine® LF 170 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 inputs and outputs are just as much standard as a complete function monitoring of the monitor and the connected sensor.

The 2 optional switch contact can be configured by the user as "openers" or "closers". Furthermore, the user can allocate a certain function to each relay, e.g. as a limit value alert. After that, the respective function parameters are defined via a submenu. With the function as a limit value alert, the lower and upper limit values are entered consecutively, the hysteresis range is set up as well as the delay time.

The simple and clear menu structure supports the user during setup and during the operation of the meter. For this, the individual operating functions are structured into three hierarchy program levels. On the operation level, the modes measurement and calibration can be selected. On the parameterization level, the parameters of the previously defined functions are entered. The bottom level is used to configure the meter, alas, here you will define the basic functions.
Access to the two bottom levels is protected by a code. In order to prevent user errors, parts of the menu are guided by locigal menu sequences.


Model Description Order no.
Oxi 170 - 230 VAC EcoLine® - Conductivity field monitor with 1 power output for conductivity, 230 VAC 381112
LF 170 R T - 230 VAC Like the LF 170, but with 2 relays and a second power output for temperature 382212

Technical Data

Connectable measuring cells 2 or 4 electrode measuring cells
Measuring ranges (cell constant) 0.000 ... 1.999 µS/cm (0.01 cm-1);
0.00 ... 19.99 µS/cm (0.01 cm-1, 0.1 cm-1);
0.0 ... 199.9 µS/cm (0.1 cm-1, 1 cm-1);
0.000 ... 1.999 mS/cm (0.1 cm-1, 1 cm-1);
0.00 ... 19.99 mS/cm (1 cm-1);
0.0 ... 199.9 mS/cm (1 cm-1, 10 cm-1);
0 ... 1000 mS/cm (10 cm-1)
Resolution 0.001 µS/cm to 1 mS/cm (depending on the measuring range)
Accuracy ± 0.5% of measured value, ± 1 digit
Adjustable cell constant 0.09 cm-1 … 1.5 cm-1 (variable)
Measuring range salinity 0.0 … 70.0; resolution 0.1 (Reference T: 20°C)
Temperature measurement NTC sensor (integrated in the sensor), -5 °C ... +50 °C; 0.1 K resolution
Temperature compensation Range: -5 °C ... +100 °C
Signal input galvanically isolated
Housing PC/GF20 housing, 7-pin connector for sensor, 4 PG screw connections (Ø 10-14 mm) to route the power and signal cables, protection class IP 66
Dimensions 222 x 202 x 105 mm (WxHxD)
Weight approx. 2.2 kg



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