Van Essen Instruments CTD-Diver Data Logger

The CTD-Diver is ideal for ground and surface water applications. Where there is a need to monitor groundwater levels and saltwater instrusion, injected wastewater, or contamination from chemical discharges and landfill sites, the CTD-Diver® with its 22 mm diameter rugged, corrosion-proof ceramic (zirconium oxide) housing, is the instrument of choice. It autonomously measures conductivity, pressure, and temperature and records them in its internal memory. The CTD-Diver is ideal for ground and surface water level applications. The CTD-Diver can store a maximum of 144,000 measurements (date/time, pressure, temperature, and conductivity) in its working memory and 144,000 measurements in its backup memory. The CTD-Diver has the following sample methods: fixed length intervals, event-dependent, averaging, and pumping tests. The measurements are stored in fixed length or continuous memmory (fixed length only). The CTD-Diver is available in the following pressure ranges: 10 m, 50 m, 100 m, and 200 m. Features & Benefits Click here to learn more about the product. Features Innovative ceramic housing technology Three sensors in one sealed housing Conductivity range up to 120 mS/cm Compact size: Ø 22 mm – length 135 mm Various measurement methods Memory: 144,000 measurements of time stamp, pressure, temperature and conductivity with backup 200-meter pressure range version available Benefits Corrosion Proof Monitor conductivity, water levels, and temperature Suitable for use at most sites Easy installation in almost every well Event based, averaging and pumping tests sample methods to conserve memory Cost effective frequent, long-term measuring Reliable and accurate data Suitable for wells with deep filters Applications Click here to view product applications. Pollution monitoring: Landfill leachate monitoring Coastal zone aquifer management: Salt water intrusion Estuary monitoring: Water quality Tidal fluctuations Mining: Tailings: Pollution Environmental: Plume/Leakage Remediation: Water quality: Correlate conductivity with permanganate Key Specifications Click here to view product specifications. General Length 135 mm Diameter 22 mm Memory 144,000 measurements Housing ceramic (ZrO2) Weight 80 grams Battery life 10 years (dependent on usage) Sample interval 1 second to 99 hours Sample methods fixed, event-dependent, and pumping test Pressure Part No DI281 DI282 DI283 DI284 Unit Range 10 50 100 200 meter Accuracy* ±0.5 ±2.5 ±5.0 ±10.0 cmH2O Resolution 0.2 1.0 2.0 4.0 cmH2O Temperature Value Unit Range -20 .. +80 °C Accuracy* ±0.1 °C Resolution 0.01 °C Value Unit Range 30 or 120 (user adjustable) mS/cm Accuracy* ±1% of reading mS/cm Resolution 0.1% of reading mS/cm *typical, see product manual for full technical specifications.