Seabird

Modular

SBE 52-MP Moored Profiler CTD & optional DO Sensor
Sea-Bird offers several modular sensors designed for integration with larger CTD packages
SBE 3F/3Plus/3S Oceanographic Temperature Sensor

High-accuracy modular temperature sensor for CTDs and custom applications.

SBE 4 Conductivity Sensor

Frequency-output conductivity sensor, for use on SBE 25 and 25plus Sealogger and SBE 9plus profiling CTDs or for fixed-site applications.