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Early OTT water current meter, circa 1917 from the collection of the Smithsonian Museum.
OTT was founded in 1873 in Kempten, Germany by Albert Ott. He focused on mechanical water level recorder, hydrometric current meter, and planimeter development. Within a short time, the globally minded inventor took his instruments to an international audience at the World Exhibition 1880 in Melbourne, and was joined in the business by his sons, Herman and Ludwig.
OTT – Continuous Commitment to Innovation
OTT’s standard-setting technologies record, measure, and analyze surface water, ground water and precipitation for data-informed insights.
Our continuous commitment to innovation, precision, and customer proximity has established OTT as the global industry leader in hydrological systems and instrumentation that it is today.
In 2010, OTT changed its name to OTT Hydromet GmbH, then in 2012, became a subsidiary of Danaher Corporation. In 2023 it became a subsidiary of Veralto Corporation, and is now one of the strong global product brands that make up OTT HydroMet.
View our broad portfolio of water measurement instruments, data management systems and meteorological sensors – all designed for precision and performance.
The OTT SVR 100 is the ideal sensor to collect surface water velocity measurements without being installed in the water, for all the benefits of non-contact measurement.
The OTT MF pro is a magnetic-inductive flow meter designed for SxS wading rod measurements in smaller rivers and open channels.
The OTT SLD is a stationary unit for continuously measuring flow velocity and water level in rivers, streams, and other open channels with flowing water.
We offer a variety of sensors with different measurement principles, tailored to fit the specific requirements of different hydrologic measurement sites, including bubbler, pressure sensor, radar, shaft encoder technology and more.
Our multiparameter sondes offer rugged and flexible options for water quality measurement. Choose from compact instruments or larger Datasondes for more diverse sensor options and anti-fouling options.
Choose from a variety of either portable or stationary measurement options using different measurement technologies, including mechanical, acoustic, Doppler, and more.
We offer dataloggers designed specifically for hydrological applications that are very low power and include a multitude of data transmission options to get data back to the office.
From equipment configuration to data management of complete measurement networks, we offer a range of software solutions that can be quickly and easily configured to deliver relevant data where and when it is needed most.
Our instruments are specifically designed to work in a variety of environmental and industrial applications and integrate seamlessly with flexible telemetry options for remote data acquisition.
OTT sensors can provide key information on trend identification and regulatory compliance for water quality and quantity parameters around agriculture and irrigation activities.
Measuring water flow and discharge to determine the amount of water flowing through an open channel is critical for predicting water availability and flood events, allocating watering, and more.
OTT water level sensors and continuous flow sensors, paired with telemetry technology and OTT Hydrosystems are able to measure, collect, and transmit water level and velocity data in real-time to determine the peak level or flow during flood events.
Measuring groundwater level or depth-to-water is critically important for identifying long term trends, including declining water levels, saltwater intrusion, seasonal variations, aquifer recharge, level status for drinking water and more.
View our precipitation measurement technologies, including high-accuracy laser disdrometers and weighing bucket gauges that can be paired with telemetry and power options for remote locations.
Providing versatile technology options for measurement of water level, flow/discharge, and water quality in surface water applications.
Offering solutions for long-term unattended measurement of nitrate and phosphate in real-time.
See how we are impacting local and global communities through real-world solutions, tailored to specific situational needs.
The Mekong River Commission Secretariat (MRCS) aims at sustainable development on managing water resources & sharing info among the Mekong member countries.
Researchers use OTT buoys and the OTT net DL datalogger to study the long term effects of climate change on the Bavarian lakes.
When the retention basin of the Arroyo Mendrano overflowed, the government decided to have an alarm system installed to monitor the water level in the basin.
The hydro-meteorological monitoring network of Sri Lanka has been extended and updated with the latest technology.
Keeping you informed.
Discover insights in hydrology and learn more about product applications and outcomes.
The Great Fen, a vast landscape located in Cambridgeshire, England, and home to two National Nature Reserves, is currently undergoing one of the largest restoration projects of its type.
Proactively address risks in water through better understanding. As utilities and agencies progress through varying stages of their digital transformation, one of the most recurring priorities is cybersecurity.
In July 2021, catastrophic flooding devastated communities in Germany, Belgium, the Netherlands, Austria, and Switzerland. Western Germany was hit the hardest with over 185 lives lost.