Nortek AS develops advanced underwater instruments such as Acoustic Doppler Current Profilers (ADCPs) and Doppler Velocity Logs (DVLs) used for oceanographic research, subsea navigation, and marine operations.
RD Instruments is the industry's premium supplier of acoustic Doppler instrumentation. RDIs ADCPs are used to profile currents in 1 to 6000 meters of water. RDIs Doppler Velocity Logs are in use around the globe providing precision navigation capability for ROVs, AUVs, submarines, tow vehicle, and surface vessels.
Teledyne RD Instruments, based in San Diego, designs and manufactures underwater acoustic Doppler products for current profiling, wave measurement, and precision navigation. Now part of the Teledyne Marine group.
Teledyne RD Instruments, founded in 1982 and now part of Teledyne Marine, designs and manufactures Acoustic Doppler Current Profilers (ADCPs), Doppler Velocity Logs, and precision navigation products for marine and inland water environments.
SonTek, a Xylem brand, specializes in acoustic Doppler current profilers and water velocity measurement instruments for environmental and water flow monitoring applications.