Water Level Sensors

OTT

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

SPECIFICATIONS

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
Downloads

Brochure

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Manual

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