NDLI: Inexpensive Expendable Conductivity Temperature and Depth (CTD) Sensor

Content Provider	IEEE Xplore Digital Library
Author	Paradis, R. Wood, S.L.
Copyright Year	2013
Description	Author affiliation: Dept. of Marine & Environ. Syst., Florida Inst. of Technol., Melbourne, FL, USA (Wood, S.L.) \|\| Florida Inst. of Technol. & currently is an Eng. at Gen. Dynamics - Electr. Boat, Groton, CT, USA (Paradis, R.)
Abstract	The Conductivity, Temperature, and Depth (CTD) sensor is one of the most used instruments in the Oceanographic field. These devices are the number one, most important sensor for any research of the ocean depths. CTD measurements are found in every marine related institute and navy throughout the world because they are used to produce the salinity profile for the area of the ocean under investigation. In order to deploy large numbers of CTD sensors, an inexpensive version is needed, especially if used as a one-time (throw-away) system. Oceanographic institutes and navies require instruments such as these that are reliable, accurate, precise and inexpensive. The CTD developed in this paper is low cost and disposable that can be easily and rapidly deployed to obtain measurements throughout the earth's oceans. Five (5) specific specifications for the device (ECS Unit Sensor) were paramount: 1) Its weight had to be under 5-lb (2.27-kg) maximum, but ideally as close to 1 to 2lb (0.45-kg to 0.9-kg) as possible; 2) Its dimensions must be no bigger than 10-in (25-cm) in height and 3-in (7.6-cm) in diameter; 3) It must be reasonably priced to be expendable; 4) It must have wireless communication; and 5) It only has to record the top 10m of the water column. This paper describes the design, development, construction and testing of the Expendable Conductivity Sensor Unit (ECS Unit), which when deployed, takes multiple snapshots of the water profile and sends its data out via a satellite communications chip. The ECS Unit was tested against other CTDs for accuracy. When compared to the other expendable CTDs the ECS Unit, along with being much more economical, is able to provide more snapshots than any other expendable CTD instrument currently available on the market. The CTD instrument (ECS Unit Sensor) developed in this project costs around $982.00 per unit to make.
Sponsorship	IEEE Oceanic Eng. Soc.
Starting Page	1
Ending Page	12
File Size	2039714
Page Count	12
File Format	PDF
ISBN	9780933957404
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Ocean temperature Temperature measurement Sea measurements Conductivity Sea surface Probes temperature conductivity CTD depth expendable
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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