RD Instruments joins Teledyne (2004)
RD Instruments (RDI), SonTek's hometown rival in San Diego acoustic Doppler current profiling, was acquired by Teledyne Technologies. The two firms had competed for decades on ocean and river measurement hardware.
RDI became part of Teledyne Marine, keeping its brand and San Diego-area base.
The acoustic Doppler profiler market settled into two conglomerate-owned camps: Teledyne with RDI, and Xylem with SonTek.
Shows how independent instrument makers that once competed in San Diego got absorbed by larger firms, setting the stage for consolidation decisions like the SonTek closure.
