三参数（水位，水温和电导率）
三参数地下水自动记录仪。荷兰新推出的CTD-Diver又一次提高了地下记
录仪的标准。外壳采用完全抗腐的陶瓷材料，极大地提高了产品的可靠性和长期工作的稳定性。内部三个传感器同时测定水位、温度和电导率，并存储于仪器内存中，可随时下载到计算机进行处理。CTD-Diver可以广泛应用于排放监测，垃圾填埋处理监测，以及蓄水层贮存和土地恢复项目，盐化项目，海水侵蚀项目等。
CTD-Diver
3 Parameters in 1 Housing
Where there is a need to monitor groundwater levels and saltwater intrusion, injected wastewater, or contamination from chemical discharges and landfill sites, the CTD-Diver with its rugged, corrosion proof ceramic housing, is the instrument of choice.
The CTD-Diver is equipped with a four-electrode conductivity sensor that measures electrical conductivity from 0 to 120 mS/cm. There are two options for measuring conductivity: true or specific conductivity at 25 °C. Additionally, pressure and temperature are measured and recorded.
Features
Ø Innovative ceramic housing technology
Ø Three sensors in one sealed housing
Ø Conductivity range up to 120 mS/cm
Ø Compact size: Ø 22 mm - length 135 mm
Ø Various measurement methods
Ø 48,000 records of time stamp, pressure, temperature and conductivity
Ø 30-Point pressure factory calibration
Ø Benefits
Ø Corrosion proof
Ø Monitor conductivity, water levels, and temperature
Ø Suitable for use at most sites
Ø Easy installation in almost every well
Ø Event based, averaging and pumping tests sample methods to conserve memory
Ø Cost effective frequent, long-term measuring
Ø Reliable and accurate data
Applications
Ø Monitoring saltwater intrusion
Ø Water quality monitoring for:
Ø Agriculture
Ø Remediation
Ø Correlate conductivity with salt, TDS, permanganate, nitrate, sulfate
Ø Tidal fluctuations monitoring
Ø Estuary and wetlands monitoring
Ø Leachate monitoring at landfill sites
Ø Aquifer storage and recovery
Ø Monitoring network automation
Ø Groundwater monitoring projects
Ø Mining:
Ø Tailings
Ø Environmental
Ø Slope stability
Technical Specification
General
Length Diameter Weight Memory Wetted parts housing conductivity sensor housing conductivity sensor o-rings pressure sensor cap / nose cone Battery life Sample interval Sample methods | 135 mm 22 mm 95 grams 48,000 measurements
ceramic (ZrO2) ceramic (ZrO2) platinum electrodes on ceramic (Al2O3) carrier Viton ® piezoresistive ceramic Nylon PA6 30% glass fiber 10 years (dependent on usage) 1 second to 99 hours fixed, event dependent, averaging, and pumping test |
Pressure
| Model | DI271 | DI272 | DI273 | Unit |
Range | 10 | 50 | 100 | meter |
Accuracy | ±0.5 | ±2.5 | ±5.0 | cmH2O |
Resolution | 0.2 | 1.0 | 2.0 | cmH2O |
Temperature
Value | Unit | |
Range | -20 .. +80 | °C |
Accuracy | ±0.1 | °C |
Resolution | 0.01 | °C |
Conductivity
Value | Unit | |
Range | 30 or 120 (user adjustable) | mS/cm |
Accuracy | ±1% of reading | mS/cm |
Resolution | 0.1% of reading | mS/cm |
