Van Essen Instruments CTD-Diver Data Logger
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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.