The OTT CTD is an integrated sensor and datalogger for measurement of water level, temperature, and conductivity in groundwater and surface water applications.
It features a robust ceramic measuring cell for long term accuracy and has outputs for salinity and total dissolved solids (TDS).  Its built in datalogger manages and stores all measurements at user-programmable intervals.

• Application: Surface water, Groundwater
• Measurement technology: Vented pressure cell and 4-electrode graphite conductivity cell
• Parameters measured: Waterlevel, Temperature, Conductivity
• Product Highlights: Measures and stores water level, temperature, and conductivity data
• Measurement range: Water level: 0 … 4, 10, 20, 40, and 100 m Conductivity: 0.001…2.000 mS/cm, 0.10…100.00 mS/cm
• Accuracy: ±0,05 % FS
• Internal data logger: Yes