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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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        OTT PLS 500 - Pressure Level Sensor

        Robust ceramic pressure transducer for water level measurement

        The OTT PLS 500, SDI-12 or Modbus RTU ... measures water level, depth to water, or pressure by means of an easy to maintain, ceramic pressure cell.

        • Surface water, Groundwater
        • Vented pressure cell
        • Water Level, Pressure, Temperature, Position of Sensor, Internal Relative Humidity
        • Water level and temperature measurement - for use with external data logger
        • 0 … 10, 20, 40, and 100 m
        • ± 0.05% full scale (linearity and hysteresis) // Meets USGS OSW
        • No
        • SDI-12 and RS485 (SDI-12 v1.4 and Modbus RTU)

        OTT ecoLog 1000 Water Level Logger

        Self-contained, robust surface and groundwater level logger for measuring water level, temperature, and conductivity.

        The OTT ecoLog 1000 is a self-contained groundwater level logger for measuring water level, temperature, and conductivity, providing reliable and accurate data with integrated mobile communication.

        • Surface water, Groundwater
        • Vented pressure cell
        • Water level/pressure, water temperature, conductivity (optional)
        • Integrated cellular modem (4G / 2G) EU-MEA or IoT LTE-M (CAT M1), Bluetooth Low Energy (BLE), operation via APP, Lithium Powerpack with plug, exact battery level indicator, service life > 10 years, IP data transmission, cable can be shortened on site
        • 0 … 4, 10, 20, 40, and 100 m
        • ± 0.05 % FS
        • Yes

        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 - 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

        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

        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

        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

        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 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

        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

        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

        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)