The Coastal Ocean Institute and Rinehart Coastal Research Center's CTD Systems
The Coastal Ocean Institute has acquired two CTD systems which may be borrowed. These two systems increase the ability of the WHOI coastal community to make observations anywhere from the shelf break to shallow lagoons. The instruments are:
- a smaller Ocean Sensors CTD for small boat deployment
- a larger, fully instrumented FSI CTD for winch deployment
The Falmouth Scientific CTD system meets NSF Level 1 CTD standards and is capable of being used on research vessels equipped with a winch. The system is composed of a basic FSI Integrated CTD unit with three temperature sensors (slow and fast platinum thermometers and a fast thermistor), conductivity and pressure sensors, a water sampler capable of carrying up to 12 standard 10 liter Niskin bottles. A Seatech fluorometer and transmissometer, and a LiCor PAR (photosynthetically active radiation) sensor are also available. The system has an altimeter which allows the distance from the CTD to the bottom to be read on the deck box in real-time, thus allowing the scientist to make close-to-bottom profiles with reduced danger of bottom contact. The instrument is modular and the basic CTD could be used by itself on a small boat with conducting wire to record temperature, conductivity and pressure profiles. The CTD also has a memory option (in place of the wire telemetry unit), powered by an external battery pack, and the data is recorded internally which may dumped to a PC later. The FSI CTD is calibrated and maintained by Marshall Swartz and the WHOI CTD group; to obtain more information and schedule its use, contact Jim Irish (PO).