Our products
The following pages shows our measuring instruments and system solutions for water level, discharge, precipitation and water quality measurement as well as complementary data loggers, operating and reading units and solutions for communication and data processing via OTT Software Hydras 3.
All-in-One Handheld Device XA1000 - discontinued
The most precise and flexible all-rounder instrument for professional applications-easy to handle and robust for measurement of Temperature/Humidity, flow, co2 and air pressure
The most precise and flexible all-rounder handheld instrument for professional applications detecting temperature, rel. humidity, air pressure, air flow and co2 - easy to handle and robust!
- Integrated sensor for air pressure, exchangable sensors for highly precise measurements of temperature, relative humidity and air flow
- Various - thus exchangable sensors
- Precice and flexible all-rounder handheld instrument, easy to handle and robust, sensor connection with automatic recognition, saves measuring campaignes, allows all climate data to be calculated and archieved, evaluation software SmartGraph3 included
- USB (Cable and SmartGraph3 software included)
Aquarius Software
Data Management Software for Water Resources
Water monitoring agencies worldwide trust Aquarius to acquire, process, model, and publish water information in near real-time.
- Flood, Groundwater, Water Availability, Water Quality
Hach LDO® Dissolved Oxygen Sensor
Since 2002, Hach has established itself as the premier provider of luminescent dissolved oxygen (LDO) technology. Only Hydrolab multiparameter sondes feature Hach LDO technology – designed, manufactured, and supported by Hach in Loveland, Colorado. Now in its second generation, the Hach LDO sensor for Hydrolab sondes is better than ever.
Hydrolab HL4 Multiparameter Sonde
New Hydrolab Platform: Reliability, Ease-of-use, Metadata
The Hydrolab HL4 is the next generation multiparameter water quality sonde from OTT Hydromet. Its reliability, ease-of-use, and metadata produce water quality data you can trust.
- Attended, Unattended
- Temperature, Conductivity, Depth, pH, Dissolved Oxygen (LDO), Turbidity, ORP, Clorophyll a, Blue-green algae, Rhodamine, Ammonium, Nitrate, Chloride
- The next generation multiparameter water quality instrument
- SDI-12, RS-485, RS-232, TTY, USB
Hydrolab HL7 - Multiparameter Sonde
Water Quality Measurement Instrument
The HYDROLAB HL7 multiparameter sonde offers a versatile, durable and practical solution for long-term continuous and profile monitoring for both simple and complex deployments.
- Attended, Unattended
- Temperature, Conductivity, Depth, pH, Dissolved Oxygen (LDO), Turbidity, ORP, Blue-Green Algae, Chlorophyll a, Ammonium, Nitrate, Chloride
- The next generation multiparameter water quality instrument
- SDI-12, RS-485, RS-232, TTY, USB
Hydrolab Operating Software
Hydrolab software for interfacing with water quality sondes
PC-based application for interfacing with Hydrolab HL Series sondes, the Hydrolab Surveyor HL, and Hydrolab communications modules.
- Hydrometry
- Compatible with Microsoft Windows XP SP3, Vista, 7 (32 bit or 64bit) or 8
- Easily switch between PC and handheld versions, self-monitoring system, semi-automated calibration
Lufft WS100 Radar Precipitation Sensor / Smart Disdrometer
Real-time measurement of precipitation type (Rain, snow, sleet, freezing rain, hail) and intensity, thanks to radar measurement technology. The absolutely maintenance-free smart radar rain sensor & present weather detector!
The Lufft WS100 is a maintenance-free radar precipitation sensor. It recognizes the type and amount of precipitation from the first drop. The sensor is suitable for hard-to-reach places.
- Rain/precipitation quantity, rain/precipitation type (Rain, snow, sleet, freezing rain, hail)
- 24GHz Doppler radar
- Very fast response time, maintenance-free measurement, present weather detection
- RS-485 semi-duplex two-wire, SDI-12, pulse interface / UMB protocol, Modbus
OTT C2
Small - Mini Current meter for discharge measurements OTT C"
The OTT C2 small current meter for discharge measurements for shallow waters in small rivers, channels, laboratories and river models.
- Spot
- Mechanical
- Flow velocity
- OTT C2 - the original for wading rod measurements in shallow streams, applicable from 4 cm water depth.
- 0.025 ... 5 m/s
- ± 2%
OTT C31
OTT C31 Universal Current Meter for discharge measurements
OTT C31 Universal current meter for flow velocity measurement in rivers and open waterways. Rod-mounted or as cable-suspended current meter from a bridge, boat or on cable ways.
- Spot
- Mechanical
- Flow velocity
- C31 - the original. Taditional hydrometric current meter with proved quality for use with wading rods, from bridges and at cable-way installations
- 0.025 ... 10 m/s
- ± 2%
OTT Cable Way Systems
Stationary systems for vertical based discharge measurements
The rugged stationary cable way systems made by OTT provide safety in vertical method based discharge measurement. They are type-tested and designed for long-term dependable operation at rivers or canals.
- Fixed installation
- Maintenance-free cable way system for span lengths of up to 160 m. All components are maintenance free. Oil-free gas pressure spring tensioner for span lengths of above 20 m. Electrical or optionally mechanical double-drum winch.
- Vertical method based discharge measurements
- Rivers and canals
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 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 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 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 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 Hydras 3 Basic
Basic communication software
OTT Hydras 3 Basic software simplifies the management of dataloggers, stations and small measuring networks.
- Hydrometry, Meteorology and Environmental Protection
- Microsoft Windows 95/98/2000, Windows NT 4.0, Windows XP, Windows Vista, Windows 11
- Graphical editor, Parametrization and data reading of stations, Autoimport of data, Displaying data
OTT Hydras 3 net
Monitoring network management software
Monitoring network management software OTT Hydras 3 for professional data management, evaluation, processing and alarm management.
- Hydrometry, Meteorology and Environmental Protection
- Microsoft Windows 95/98/2000, Windows NT 4.0, Windows XP, Windows Vista, Windows 11
- Graphical editor, Map display, Alarm management, Parametrization and data reading of stations, Autoimport of data, Autoexport, Displaying data
OTT Hydras 3 net Hosted
Browser-based data visualization and network management
Web-based monitoring network management software for professional data evaluation, processing and alarm management.
- Groundwater monitoring, surface water quantity, flood, water quality, meteorological observations
- Standard web browser
- Data hosting, Data visualization, Map display, Thresholds & alarming, Webcam images, Remote network management
OTT Hydromet Cloud
Streamlined Data Management Across All Devices
Hydromet Cloud provides secure real-time data access from almost anywhere in the world via HydrometCloud.com and the Hydromet Cloud Mobile App
- Hydrology, Meteorology
- Web interface, iOS and Android Mobile Apps
- Web-based data management and alerts, available across all mobile devices!
OTT HydroSystems
Complete hydrological gauging stations with telemetry
OTT HydroSystems allow hydrological measuring stations to be set up using only a few manual operations. The completely fitted system cabinets include components for power supply and everything that is needed for storing and transmitting measured data.
- Turn-key solutions for stand-alone measuring stations
- Gauging station, Pole mount
- Battery, Solar
- Cellular, Satellite (GOES/Meteosat)
OTT Maximum Level Gauges
OTT Maximum Level Gauge to indicate 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.
- Surface water
- Visual, color tape
- Water level
- Records high tide or surface water level
- 1 m
OTT MetSystems
System cabinets with integrated components for automatic weather stations
The top quality control cabinets of the OTT MetSystems are equipped with all components for remotely transferring meteorological data – properly installed and wired. The already preconfigured sensors may easily be connected.
- Compact solution for automatic weather stations
- Synoptic and climatological weather stations
- Mains power
- Cellular, Ethernet
OTT MF pro - Water Flow Meter
Handheld electromagnetic water flow meter with automatic discharge calculation
The OTT MF Pro is a user-friendly, low maintenance electromagnetic current meter for cost-efficient in-stream discharge measurement.
- Spot
- Electro-magnetic
- Flow velocity and water depth
- Low maintenance magnetic - inductive probe with level measurement for reliable flow measurements. Works well in low flow and turbulent conditions, cross - sections with weed growth and pollution. Applicable in streams and conduits.
- 0 … 6 m/s
- ± 2% of measured value ± 0.015 m/s ( 0 … 3 m/s ) and ± 4% of measured value ± 0.015 m/s ( 3 … 5 m/s )
OTT netDL Data Logger
Data loggers for remote data collection & long term monitoring
The versatile OTT netDL 500 and 1000 data loggers were developed specifically for use in hydrology and meteorology stations. In addition to recording data, the loggers are extremely low power and offer flexible data transfer options via the internet and mobile networks, providing a logging and telemetry solution for every project.
- Ethernet, USB-Host, USB-Device, RS-232, Satellite, Cellular, Industrial Communication
- High data availability due to large memory and redundant communication, Multitasking capability for short polling cycles, Communication via TCP/IP, Integrated Web Server, Ultra low power consumption, Design for harsh environments, Industrial communication
- Yes
- SDI-12, RS-485 (SDI-12), Modbus RTU, analogue-in (voltage and current), Impulse Input, Status Input
OTT Parsivel² - Laser Weather Sensor
Laser precipitation disdrometer measuring all precipitation types
The OTT Parsivel² is a modern laser disdrometer for comprehensive measurement of all precipitation types. The Parsivel² captures both the size and speed of falling particles, classifying them into one of 32 separate size and velocity classes.
- Precipitation type, intensity, drop size distribution, radar reflectivity
- Laser optical
- Simultaneous measurement of 32 classes for particle sizes and velocities
- SDI-12 / RS-485, pulse
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 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 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)
OTT Pluvio² L – Weighing Rain Gauge
All-weather, high accuracy rain gauge for continuous data collection
The OTT Pluvio² L is an all-weather precipitation gauge that uses superior weight-based technology to measure the amount and intensity of rain, snow, and hail.
- Cumulative precipitation, precipitation intensity, bucket content in real time and non real time
- Weighing principle
- All-weather precipitation gauge without moving parts according to WMO guide line No. 8
- SDI-12 / RS-485, pulse
OTT Pluvio² S
Compact universal weighing precipitation gauge
The OTT Pluvio² S compact weighing precipitation gauge measures liquid, solid and mixed precipitation with remarkable precision. It is virtually maintenance-free and fits on 2-inch pedestals.
- Cumulative precipitation, precipitation intensity, bucket content in real time and non real time
- Weighing principle
- Compact all-weather precipitation gauge for 2-inch pedestals, highly accurate, meets WMO requirements (Guidelines No. 8), nearly maintenance-free, lifetime calibrated
- SDI-12, RS-485, impulse, status
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 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 SVR 100
Surface Velocity Radar for Measuring Open Channel Flow
OTT SVR 100 is a simple, non-contact, compact surface water velocity radar sensor. Designed for measuring flow in open channels and rivers where reliable velocity data is required continuously, during floods or periods of high concentrations of suspended sediments.
- Fixed installation
- Identify data influenced by sensor movement (e.g., wind, traffic) using meta data from integrated vibration and tilt sensors
- Non-contact surface velocity radar
- No
- 0.08 ... 15 m/s (0.26 … 49 ft./s)
OTT TRH
Weather sensor for humidity and temperature
The digital weather sensor reliably measures the relative humidity and temperature. Equipped with a protective housing it can be used in a large variety of applications.
- Air temperature and relative air humidity (measured), absolute air humidity, dewpoint and mixing ratio (calculated)
- PT1000, capacitive
- Low power draw, long-term stable, suitable for extreme temperatures, protective housing included
- SDI-12 V1.3
OTT Water Quality Buoy
Buoy used to measure water quality parameters
OTT Water Quality monitoring buoy with remote data transmission for rivers, lakes and near coastal applications. Designed to operate with HYDROLAB HL7 or HL4 multiparameter sondes.
- Stand-alone water quality measurement buoy solution
- Temperature, Conductivity, Depth, pH, Dissolved Oxygen (LDO), Turbidity, ORP, Blue-Green Algae, Chlorophyll a
- Cellular
OTT Z400
Counterset for current meter flow measurements
The counter OTT Z400 is a useful tool for flow measurements with hydrometric current meters. It records the number of propeller revolutions and, if required, calculates the velocity of flow.
- Spot
- Numbers of pulses
- Compact handy counter for mechanical current meters with optional display of velocity of flow and integrated user software for the management of calibration tables
- 50 Hz (680 Ohm), 100 Hz
- ± 0,01 s / ± 0,5 Impulse
Sea-Bird Scientific ECOs
Fluorometers ECO PAR Seabird Scientific
The Sea-Bird Scientific ECO FL fluorometers with technology by WET Labs measure fluorescence from chlorophyll-a, CDOM, uranine, phycocyanin, and phycoerythrin.
Sea-Bird Scientific HydroCAT
For longterm water quality monitoring with proven anti-fouling technology
The Sea-Bird Scientific HydroCAT with technology by Sea-Bird Electronics (SBE) is ideally suited for extended deployments in remote, biologically rich environments.
- Unattended
- Temperature, Pressure, Dissolved Oxygen, Conductivity
- Ideally suited for extended deployments in remote, biologically rich environments
- SDI-12, RS-232, RS-485 (optional)
Sea-Bird Scientific HydroCAT-EP
Long-term Deployment Water Quality Sonde
The newest member of the HydroCAT family of water quality Sondes can also measure pH, turbidity and chlorophyll.
- Unattended
- Temperature, Pressure, Dissolved Oxygen, Conductivity, pH, Turbidity and Chlorophyll
- Designed specifically for long-term deployments of up to three months
- SDI-12, RS232
Sea-Bird Scientific SUNA Optical Nitrate Sensor
High accuracy in-situ nitrate measurement
The Sea-Bird Scientific SUNA V2 UV nitrate sensor with technology by Satlantic is the ultimate chemical-free solution for autonomous monitoring in estuarine and freshwater environments.
- Attended, Unattended
- Nitrate
- High-accuracy, chemical-free, in-situ nitrate measurement
- SDI-12, RS-232
Sea-Bird Scientific WQM
Water Quality Monitor for Maximum Deployment Times
The Sea-Bird Scientific WQM X with technology by Sea-Bird Electronics and WET Labs is designed specifically for long-term moored operations in biologically rich water.
- Unattended
- Conductivity, pressure, chlorophyll, temperature, dissolved oxygen, turbidity
- Designed specifically for extended deployment in biologically rich waters
- RS-232
Sutron SatLink 3 GOES Data Logger
The World’s First Wi-Fi Multi-Communications Logging Transmitter
Sutron’s SatLink3 provides a cost-effective way to measure, log, calculate and transmit data from remote locations around the world. The unit monitors 32 independent measurements of most hydrological, meteorological, environmental or related sensors.
- WiFi, USB-Host, USB-Device, RS-232, Satellite, Cellular, Data Logger
- The Industry's First Wi-Fi Multi-Communications Logging Transmitter
- Yes
- SDI-12, RS-232, Analog, Digital, RS-485, 4-20mA
Sutron SatLink 3 XMTR
Satellite Transmitter
The SL3-XMTR-1 Transmitter offers a reliable and low-cost method of adding Meteosat / GOES satellite transmission capability to almost any Data Logger. SL3-XMTR transmits the buffer contents of a data logger to one of many Environmental Satellites for which it is certified.
- Transmitter for Meteosat HDR , GOES and other Satellites
- Serial Communications over USB port or RS-232 ports
- Satellite
Sutron SatLink3 Lite Data Logger
Cost-effective solution to log and transmit data over geostationary environmental satellites.
Sutron’s SatLink3 provides a cost-effective way to measure, log, calculate and transmit data from remote locations around the world. The unit monitors 32 independent measurements of most hydrological, meteorological, environmental or related sensors.
- WiFi, USB-Device, Satellite, Data Logger
- Geostationary satellite transmitter; NESDIS GOES CS2.0 certified; LinkComm built-in templates for configuration; SDI-12 ports (up to 32 sensors connected); compliant with SDI-12 v1.3 specification; tipping bucket input; equation engine; local access to data and configuration via WiFi and USB; remote access via mobile communication (with external modem)
- Ground Water, Surface Water Level / Flow, Water Quality, Meteorology and Climatology, Flood Warning
- Yes
- SDI-12, RS-232, WiFi, USB
- Self-timed of random transmission via GOES 300 BPS (CS 2.0 Specification) and GOES 1200 BPS (CS 2.0 Specification); METEOSAT (coming soon)
Sutron XLink 100/500 Logging Transmitter
Multi-Sensor Input Logger with data transmission via lridium or Cellular
Sutron’s XLink product family offers a cost-effective Wi-Fi enabled datalogger with data transmission via Iridium or Cellular.
- USB-Host, RS-232, Cellular, Data Logger, RS-232 and RS-485, Switchable SDI-12 power, Iridium
- Plug and play modem, custom programming with Python Scripts (XLlink500), up to 32 measurements, log up to 1,000,000 readings, USB flash drive, secure communication (TLS 1.2 ciphers), multiple interfaces and protocols (HTTP,TCP/IP,FTP), and 3 levels of security to configure, perform maintenance or access data
- Yes
- SDI-12, RS-232, RS-485
Sutron XLite 9210 Data Logger
Maximum value and functionality Data Logger
Designed for maximum value and functionality, the XLite 9210B is a high performance data recorder and communications device ideal for remote real-time data acquisition, control, and communications.
- WiFi, Ethernet, USB-Host, USB-Device, Radio
- Multi-tasking logger with a 32-bit processor capable of making measurements & communicating simultaneously
- Yes
- SDI-12, RS-485, RS-232, analog, digital, 4-20mA
Ventus
Ultrasonic Wind Sensor
Thanks to the ultrasonic measuring method the wind sensor Lufft Ventus has no moving parts and therefore needs almost no maintenance. It measures wind speed and wind direction according to the WMO guideline and acquires the barometric pressure.
- Wind speed, wind direction, virtual temperature, barometric pressure
- Ultrasonic
- Maintenance-free measurement, suitable for extreme ambient conditions, ice-free operation, vibration and seawater resistant, compatible interfaces
- SDI-12, RS-485, various RS-485-protocols, analogue output