CTDs come in a variety of shapes, sizes, and applications. Most oceanographic vessels have a CTD connected to a rosette system, which can house other instruments and collect physical water samples in parallel with real-time data collection. CTDs are also commonly attached to moorings, autonomous underwater vehicles (AUVs), remote-operated vehicles (ROVs), and, on occasion, marine animals.
Commercial CTDs are expensive, with the most affordable models costing as much as $6,000.00. The expense of the CTD is a barrier-to-entry for formal and informal researchers working with limited budgets.
The latest model – now using Adafruit Feather
The OpenCTD can be built in two days by someone with no electronics experience using parts available from hardware stores, electronics suppliers, Adafruit.com as well as a few 3D-printed components for about $300. It is rated to depths of 140 meters, providing access to the majority of the world’s continental shelf for a fraction the cost of a traditional research cruise.
Read more about OpenCTD and how true sensor data collection can be done economically:
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.