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CTD

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: Water level, 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

Features
  • Outputs for conductivity include specific conductivity, salinity, and total dissolved solids

  • Ceramic pressure cell provides industry-leading accuracy

  • Conductivity, depth, and temperature measurements are combined into a single device that easily installs in a 1” or larger well or conduit

  • 4 MB of memory provides capacity for over 500,000 data points—ideal for long-term deployments OR short-term, high resolution pumping studies

  • Can be powered for over 18 months with off-the-shelf alkaline batteries or over 5 years with lithium batteries

  • Ability to perform contact gauge control measurements without sensor removal, so no need to pull the cable for routine maintenance

  • Complete in-well solution: all components are inserted into the groundwater well, eliminating the possibility of instrument vandalism

  • Battery life: up to 5 years with lithium batteries, with alkaline options are also available.
  • Long-term accuracy: a robust ceramic pressure cell will not deform over time, and an accurate 4-electrode conductivity measuring cell provides outputs for salinity and total dissolved solids (TDS)
  • User-friendly interaction: only one program required to setup unit and download data, plus a simple infrared communication interface that provides easy on-site data download
  • Simple Maintenance: Infrared interface, batteries, and desiccant are accessible at the top of the well or pipe and no tools are required

Specs

Water level measurement

 

Measurement range:

0 ... 4 m, 10 m, 20 m, 40 m, 100 m

Resolution:

0.001 m / 0.1 cm / 0.01 ft / 0.1 inch
/ 0.0001 bar / 0.001 psi

Accuracy:

± 0.05 % FS

Units:

m, cm, ft, inch, bar, psi

Temperature compensated operating range

-5 .... +45 °C (ice free)

Temperature measurement

 

Measurement range:

-25 ... +70 °C

Resolution:

0.01 °C

Accuracy:

± 0.1 °C

Conductivity measurement

Measurement range selectable

Measurement range 1:

0.001 ...? 2.000 mS/cm

Resolution:

0.001 mS/cm

Accuracy:

±0.5 % of measurement value; (min ±0.001 mS/cm)

Units:

mS/cm / µS/cm

Measurement range 2:

0.1 ... ?100 mS/cm

Resolution:

0.01 mS/cm

Accuracy:

±1.5 % of measurement value; (min ±0.01 mS/cm)

Units:

mS/cm

Electrical data

 

Power supply

Lithium or Alkaline batteries
3 x 1.5 V battery (LR6·AA, FR6·AA)

Lifetime (@ 1 h interval)

 

with Lithium-batteries

≥5 years

with Alkaline-batteries

≥1.5 years

Interface

Infrared (IrDA)

Datalogger

 

Memory

4 MB

Amount of values

approx. 500,000

Measurement interval

5 sec ... 24 h

Storage interval

5 sec ... 24 h

Installation

≥ 1"

Material

ABS, POM, stainless steel 1.4539 (904 L)

Weight

 

Com unit (incl. bat)

approx. 0.410 kg

Sonde

approx. 0.430 kg

Dimensions

 

Com unit L x Ø

400 mm x 22 mm

Sonde L x Ø

317 mm x 22 mm

Max system length

1.5 … 200 m ±1 % ±5 cm

Storage temperature

-?40 ... +85 °C

Protection class

 

Communication unit

IP67 (i.e max. 2 m, for max. 24 h)

Sonde

IP68


Documents
Brochure
Manual
Related Categories
Water Quality Multiprobes
Aqualab Systems
Handheld Communications