Welcome to YSI Hydrodata
Located in Letchworth, UK, YSI Hydrodata distributes YSI and SonTek instruments and monitoring systems, providing training, installation, service, repair and calibration support services in addition to a full range of rental products. We are a division of YSI Incorporated, a global business committed to sustaining the quality and viability of the Earth's water resources with the world's most accurate and reliable water quality and hydrology measurement technologies.
Featured Applications
Effective port or harbour management requires monitoring data for tides, underwater surfaces and water quality.
Pollution monitoring technology has advanced considerably & many options now exist for monitoring both diffuse & point source pollution.
YSI's instruments and systems are designed to work in the most harsh of environments including the monitoring of the coastal waters.
News Updates
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Water Quality is key to the success of Cardiff Bay Restoration 
Water quality has been a central theme in a redevelopment project that began with the creation of the Cardiff Bay Development Corporation in 1897....
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New CTD Monitoring Technology Helps Reveal Arctic Secrets 
A group of Arctic researchers has employed the latest monitoring technology to investigate the effects of climate change, by measuring temperature and salinity in the water column beneath surface ice....
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Support
Other YSI Divisions
YSI ISA - Instrumentos e
Servicios Ambientais
(Latin America)
Rental Specials
Designed with the need for an easy way to measure water velocity, level and calculate flow / discharge in open channels, the Argonaut-SL has earned worldwide acceptance as a long-term monitoring...
Remote boat...
Upcoming Events
Event Calendar