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Datasheet

LeveLine CTD Logger

Description

The LL-GAUGE-CTD-Package is ideal for monitoring rivers, docks or coastal water levels over a depth range of 10m in a single package. This covers most tidal ranges in rivers across the UK and rest of the World. Using a gauge sensor ensures readings are compensated for the barometric pressure at the location, but it does mean you need to ensure the vented cable isn’t submerged during any flooding event. The CTD sensors allow you to monitoring temperature and Conductivity along with the depth readings. The LL-GAUGE-CTD-Package contains: a 0-10m LeveLine Gauge CTD Sensor, LL-EX-10m-V (vented cable), EX-DH (desiccant housing that fits to the cable connector), DC-100 (100ml desiccant cartridge, fits to EX-DH), RC-300 (conductivity calibration solution 2570µS) and a LL-PC-KIT download cable.

Features

  • 0.05% FS accuracy for water depth.
  • 1% of reading accuracy for conductivity and salinity.
  • 500,000 data point memory.
  • 10 Year Battery Life.
  • Titanium Body.
  • 5 Year Warranty.
  • Included LeveLink PC Software for basic and advanced data compensation.
  • SDI-12, RS485 Modbus communications.
  • 22mm x 186mm
  • Vented option available.

Applications

  • Saltwater Intrusion.
  • Contaminant plume profiling.
  • Tracer tests.
  • Leachate monitoring.
  • Groundwater level monitoring, pump tests, slug tests etc.
  • Stream, lake and reservoir water level measurement.
  • Wetland and flood water monitoring.
  • Coastal monitoring.
  • Tank level measurement.
  • Long term continuous monitoring in boreholes, surface water and seawater applications.

The 4 ring stainless steel conductivity sensor for EC and salinity measurements is located under the elongated nose sleeve. The black plastic nose sleeve (shown removed on the right of the photo) forms an integral, working part of the Probe’s EC measurement system, and MUST be fitted during calibration and measurement for correct operation. On a regular basis, thoroughly clean the inside of the nose sleeve and the four metal EC contacts situated in the EC cell with a soft cloth or toothbrush and non-abrasive detergent. Never use solvent or alcohol based products to clean the EC cell. After cleaning, replace the nose sleeve and re-calibrate the EC sensor with the RapidCal solution.

Specifications

GENERAL
Temperature ranges Operational: -20-80°C, Storage: -40-80°C, Compensated: -20-80°C
Diameter 22mm
Length 260mm
Weight 250g
Materials Titanium body, Delrin nose cone
Output options RS485 Modbus, SDI-12, Aquaread proprietary
Battery type & life 3.6V Lithium, up to 10 years (Depending on logging rate)
External power 6-24vDC
MEMORY & OUTPUT RATE
Memory size 8.0MB
Data records 500,000 readings
Log types Linear, Event & User-Selectable Schedule with Future Start, Future Stop, Deploy Start and Real Time View
Fastest Modbus output rate 1 per second
Fastest SDI-12 output rate 1 per second
Real-time clock Accurate to 1 second/24-hr period (±6 minutes/year)
SENSOR
Type / Material Piezoresistive ceramic
Range (Absolute) 10.0M (32.8 ft), 20.0M (65.6 ft), 50.0M (164 ft), 100M (326 ft)
Maximum pressure Max 2x range, Burst 2.5x range
Accuracy (FS) ±0.05% FS
Resolution 0.002% FS or 1mm whichever is greater
Units of measure Pressure: mBar (psi, kPa, Bar, mBar, mmHg, inHg, cmH2O, inH2O), Level: m, ft, mm, cm and mm available in Levelink
ELECTRICAL CONDUCTIVITY
Range 0 – 200mS/cm (0 – 200,000μS/cm)
Resolution 1μS
Accuracy ±1% reading or ±1μS whichever is greater
SALINITY
Range 0-70 PSU / 0-70 ppt (g/Kg)
Resolution 0.01PSU / 0.01 ppt
Accuracy ±1% reading or ±0.1 unit, if greater
TEMPERATURE SENSOR
Accuracy & resolution ±0.1°C, 0.01°C
Units of measure Celsius (fahrenheit available in Levelink)
WARRANTY
Standard 5 years
Extended Options Available