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Water level

For water level and depth measurement, no application is the same in surface and groundwater. OTT Hydromet offers a variety of sensors with different measurement principles, tailored to fit the specific requirements of different hydrologic measurement sites, including bubbler, pressure sensor, radar, and shaft encoder technology. Multiple telemetry options are also available for remote data acquisition.

Groundwater level sensor and data logger

OTT ecoLog 500 Water Level Logger

Water level sensor with built-in datalogger for surface and groundwater applications

The OTT ecoLOG 500 is a self-contained water level instrument offering flexible remote data options and unequaled performance for the price.

  • Surface water, Groundwater
  • Vented pressure cell
  • Waterlevel/Pressure, Water temperature
  • Measures, stores, and transmits water level and temperature data
  • ± 0.05% FS
  • Yes
Integrated pressure level transducer and datalogger

OTT Orpheus Mini Water Level Logger

Pressure level transducer with datalogger for longterm groundwater monitoring

The OTT Orpheus Mini is an integrated pressure sensor and datalogger for level measurement in surface and groundwater applications.

  • Surface water, Groundwater
  • Vented pressure cell
  • Waterlevel/Pressure, Water temperature
  • Measures and stores water level and temperature data
  • 0 … 4, 10, 20, 40, and 100 m
  • ± 0.05% FS
  • Yes
With integrated sensor and datalogger for longterm monitoring

OTT CTD Sensor

Pressure sensor for longterm measurement of conductivity, temperature and water level

The OTT CTD is an integrated sensor and datalogger for measurement of water level, temperature, and conductivity in groundwater and surface water applications.

  • Surface water, Groundwater
  • Vented pressure cell and 4-electrode graphite conductivity cell
  • Waterlevel, Temperature, Conductivity
  • Measures and stores water level, temperature, and conductivity data
  • Water level: 0 … 4, 10, 20, 40, and 100 m Conductivity: 0.001…2.000 mS/cm, 0.10…100.00 mS/cm
  • ±0,05 % FS
  • Yes
pressure probe with conductivity measurement cell OTT PLS-C

OTT PLS-C

Pressure probe with conductivity measurement cell

The OTT PLS-C measures water conductivity, level, and temperature in both surface and groundwater applications via a robust ceramic pressure cell and 4-electrode conductivity cell.

  • Surface water, Groundwater
  • Vented pressure cell and 4-electrode graphite conductivity cell
  • Water level, Pressure, Conductivity, Temperature
  • Water level, temperature, and conductivity measurement - for use with external data logger
  • No
  • SDI-12 or RS-485 (using SDI-12)
Non-contact bubbler in water level sensor for surface water monitoring

OTT CBS - Compact Bubbler Sensor

Non-contact, bubbler sensor for longterm surface water level monitoring

The OTT CBS is a compact, accurate, and low power bubbler sensor for surface or groundwater level monitoring.

  • Surface water, Groundwater
  • Bubbler-in
  • Drift-free water level measurement - no pressure sensor or electronics in the water
  • 0 to 15 m or 0 to 30 m
  • ± 3 mm (high accuracy version); ± 5 mm (standard and 30 meter versions)
  • No
  • SDI-12, RS-485 (using SDI-12), or 4 ...20 mA
Contact gauge OTT KL010

OTT Contact Gauges

OTT Contact Gauges for measurements of depth to water, temperature and conductivity

OTT Contact Gauges are essential for manual water level measurements in groundwater. For measuring depth to water, temperature, and conductivity – depending on the variant.

  • Measuring tape lengths KL010: 15 ... 750 m; KL010 TM: 25 ... 500 m; KL010 TCM 30 ... 500 m
  • Groundwater
  • Contact gauge
  • Water level / Distance to water, Temperature, Conductivity
  • Manual water level, temperature and/or conductivity measurement
Longterm monitoring of conductivity, temperature and water level

OTT ecoLog 800 Water Level Logger

Groundwater level and conductivity sensor with built-in datalogger and telemetry

The OTT ecoLog 800 is a self-contained system for measurement of water level, temperature, and conductivity in groundwater and surface water applications.

  • Surface water, Groundwater
  • Vented pressure cell and 4-electrode graphite conductivity cell
  • Waterlevel/Pressure, Water temperature, Conductivity
  • Measures, stores, and transmits water level and temperature data
  • 0 … 4, 10, 20, 40, and 100 m
  • ± 0.05% FS
  • Yes
water level radar sensor for surface water applications

OTT RLS - Radar Level Sensor

Non-contact water level sensor for long term surface water measurements

The OTT RLS is a non-contact radar level sensor with pulse radar technology that is ideal for monitoring in remote or hard to reach locations.

  • Surface water
  • Water level / distance to water
  • Non-contact pulse radar
  • Measures water level or depth to water from a bridge, pier or mounting arm
  • 0.4 … 35 m
  • 0.8 … 2 m: ± 10 mm; 2 … 30 m: ± 3 mm; 30 … 35 m: ± 10 mm
  • No
  • SDI-12, RS-485 (using SDI-12), or 4 ...20 mA
OTT PLS - vented pressure transducer

OTT PLS - Pressure Level Sensor

Robust ceramic pressure transducer for water level measurement

The OTT PLS, SDI-12 or 4 ... 20 mA pressure probe, measures water level, depth to water, or pressure using an integrated controller and ceramic pressure-measuring cell.

  • Surface water, Groundwater
  • Vented pressure cell
  • Water level, Pressure, Temperature
  • Water level and temperature measurement - for use with external data logger
  • 0 … 4, 10, 20, 40, and 100 m
  • ± 0.05% FS
  • No
  • SDI-12, RS-485 (using SDI-12), or 4 … 20 mA
Water level gauges for reference

OTT Staff Level Gauges

Water level and flow gauges for measurement reference

Staff gauges from OTT as basic equipment for every level / discharge gauging station. And as all gauging stations are different, you can choose from several model variants.

  • Visual
  • Waterlevel
  • On-site water level reference
  • Customized
  • 2 cm
Maximum Waterlevel OTT GWP

OTT Maximum Level Gauges

OTT Maximum Level Gauge to indecate max water level after flood or tide

The OTT Maximum Level Gauge is a cost-effective measuring device that indicates the maximum water level by tidal waves or other level fluctuations over a color marking.

  • Visual, color tape
  • Water level
  • Records high tide or surface water level
  • 1 m
Waterlevel float operated shaft encoder OTT SE200

OTT SE 200

OTT SE 200 float-operated shaft encoder water level sensor

The OTT SE200 float-operated shaft encoder level sensor provides proven water level measurements in continuous, unattended monitoring in ground and surface water applications.

  • Surface water, Groundwater
  • Water level
  • Float-operated Shaft Encoder
  • Continuous water level measurement - for use with external data logger
  • ±30 m
  • No
  • SDI-12 or 4 ...20 mA