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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.

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        Groundwater level measurements

        OTT Thalimedes Shaft Encoder

        Float-operated shaft encoder water level gauge with internal datalogger

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

        • Surface water, Groundwater
        • Float-operated Shaft Encoder
        • Water level
        • Measures and stores water level data
        • ± 199.99 m, or ± 19.999 m
        • ± 0.002 m, ± 1 Digit
        • Yes
        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
        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
        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
        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
        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
        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
        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
        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
        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)