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.
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 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)