Tallinn University of Technology


Description: The hydromast is a unique flow sensor designed for sensing the velocity magnitude and flow direction near surfaces. Developed as part of H2020 project Lakhsmi to address the lack of in-situ measurement technologies capable of measuring near-bed flow conditions in shallow waters.


Key features: 

  • Robust underwater sensing in turbid flows from 0.3 to 1.2 m/s, up to 30 m depth, and waves

  • Can be mounted horizontally or vertically on natural or built surfaces 

  • Spatially distributed, synchronous flow-sensing arrays of hydromasts can be deployed for large-scale mapping of near-bed flows 

  • Possible live data feeds (directly from device (RS485), through communication module via LoRa, GSM) or offline logging with battery pack

Sectors: harbour safety, flow measurement for oil and gas riser, coastal and river sediment transport, coastal insurance 

Purchasing / Research Use: Please contact Asko Ristolainen (asko.ristolainen@taltech.ee)

Data sheet


Patent: US10215601B2, P202300028

EU Project: https://www.lakhsmi.eu/