Conductivity-Temperature-Depth CTD sensors, a mainstay of ocean observing, are routinely deployed from ships and fitted to autonomous instrument systems including moorings, profiling floats, gliders and AUVs. A recently-developed CTD sensor from D-2, Inc. is described and performance assessments based on laboratory calibration work and observations piggy- backed on research cruises are reviewed. The ocean observations were implemented using self-contained controller/data logger/battery units developed for this project; this subsystem is also documented. The work concludes with a discussion of further envisioned refinements to the CTD.
Conductivity, Temperature Depth (CTD) sensor, sea water salinity, physical oceanography. What is a CTD sensor? https://www.whoi.edu/what-we-do/explore/instruments/instruments-sensors-samplers/conductivity-temperature-depth-ctd-sensors/
This video has a supporting paper published with the data presented: Continued Development and Evaluation of the D-2 Inc. Hybrid CTD Sensor
Update 7/1/2025
We have new CTD Sensor data from both the Arctic ITP program and from Bermuda BATS program, this data has been submitted via a paper from WHOI to a Scientific Journal for review and publication. The new paper that has been submitted to a scientific journal and is currently being reviewed with new data, we have since redeveloped the CTD Cell since these field trials above and now we are commercially selling a much more precise version without any of the issues seen here. As soon as the paper is published we will be posting it to this site and to the CTD sensor product pages. So keep D-2.com bookmarked and check in regularly.
CTD Sensor Product Page: https://www.d-2.com/hybrid-ctd-ocean/
CTD Profiler Product Page: https://www.d-2.com/ctd_profiler_ocean/
Ultra Low Power CTD: https://www.d-2.com/low-power-ctd/
Ocean CT Sensor: https://www.d-2.com/ocean-conductivity-temperature-sensor-ocean-ct-sensor/
