The 36XW-CTD series multi-parameter probes from KELLER Pressure enable the simultaneous measurement of conductivity, temperature and depth (pressure) in bodies of water. Thanks to a mathematical model implemented in the micro controller, temperature dependencies and non-linearities are compensated with precision, guaranteeing consistently stable and highly accurate measurement results.

The integrated Pt1000 achieves a temperature accuracy of ± 0,1 °C. Conductivity can be measured with an accuracy of ± 2,5 % of the selected measuring range and is available in the ranges 0,2 / 2 / 20 und 200 mS/cm. The 36XW-CTD series probes are equipped with an RS485 interface as standard. An SDI-12 interface is available with the 36XiW-CTD series.

Extended lightning protection is available as an added extra; this provides additional operation safety even under challenging environmental conditions.

The KELLER 36XW-CTD multi-parameter probe is used in groundwater and surface water as well as water tanks in order to determine water quality and salt content, or to carry out hydrostatic pressure measurements.