DST CTD - Salinity logger   DST CTD and DST CT - Data Storage Tag/Archival tag Conductivity (Salinity), Temperature (and Depth) recorder Overview Sensors: Salinity, Temperature and Depth (optional) Memory size: DST CTD 43582 &  DST CT 65374 measurements pr. sensor Battery life: ~4 years Depth: Custom defined Conductivity ranges:     1) 3 to 37 mS/cm    2) 10 to 50 mS/cm   The smallest salinity logger on the world market Specially designed for tagging fish for analyzing fish migration, distribution feeding behavior Ideal as a stand-alone logger for sampling in the ocean for environmental studies Weighs only 19g in air and 12g in water Dimensions only 15mm x 46mm (0.6 in x 1.8 in) Memory capacity 43,582 measurements per sensor (DST CTD) or 65,314 (DST CT)  Conductivity (salinity), temperature and depth ranges selected by the customer 12 bit resolution 4 years battery life (typical)

Related Products: Data Storage Tags,Fish Archival Tags: -DST micro  -DST milli  -DST centi -DST CTD -DST GPS Fish Tag Underwater Temperature Recorders: -Starmon mini  -DST milli-T -DST centi-T

 

Applications
DST CTD and DST CT are the smallest salinity loggers on world market.  The DST CTD is specially designed as an archival tag for tagging fish for analysing fish migration, distribution, feeding behavior, vertical and horizontal movements.  DST CTD and DST CT must be fastened externally on the fish as the salinity sensor must be in direct contact with the seawater.  Star-Oddi can provide fasteners for external attachment if used as an archival tag.  The archival tags are ideal for research on other marine animals as well.  The recaptured archival tag can provide valuable information on the behavioral patterns of the tagged animal.  For recapture and return purposes, customers can define their own text on the housings. The housing is made of bio-compatible material, which does not endanger the health of the tagged animal. The non-transparent housing ensures that the sunlight does not affect the measuring and therefore provides more reliable data.      

DST CTD is also used as a stand-alone logger for sampling in the oceans.  DST CT without depth recordings is ideal for mooring applications, at a fixed known depth, increasing the memory size, and lowering the price.  For applications as fastening the CTD to fishing gear, Star-Oddi offers a protective plastic housing, for use under more harsh conditions (see pictures below).

  
 

Easy to use
DST CTD logger and DST CT logger are supported by the SeaStar software for Windows, and a communication box which connects to a PC computer.  All communications and data transfer are wireless via the communication box.  DST is inserted into the box for establishing communication, using the software.  There is no need for opening the DST, and the logger can be reprogrammed and reused as long as battery lasts.  Before use of the DST, the user sets the sampling interval and starting time.  After recapture of DST, the data is retrieved to a PC computer, using the communication box and software. 

 
 

How to Order

When you have found the product that you are interested in please Contact Us and ask for a quote, or send an inquiry about the product.

As a start kit, you need one or more DST loggers, one communication box and supporting software. We also provide protective housing for the loggers if the loggers are going to be used in fixed locations or in harsh environment.  

Star-Oddi employs very competent employees with many years of experience in electronic engineering and sales of scientific equipment for various research applications. The more information you can give us we are more likely to help you find the right product.
 

Technical Specifications 
 

Sensors	Conductivity (salinity), Temperature & Depth
Size (diameter x length)	17 mm  x 46 mm
Weight (in air/in water)	21g / 13g
Memory capacity DST CTD DST CT	DST CTD 43582 measurements pr. sensor DST CT   65374 measurements pr. sensor
Memory	131K
Memory Management	Custom Programming
Memory type	Non-volatile EEPROM
Data Resolution	12 bits
Conductivity ranges	Available ranges (customer specified): 1) 3 to 37 mS/cm 2) 10 to 50 mS/cm
Salinity range	Depends on conductivity range selected
Resolution salinity (avg.)	0.02 PSU
Resolution conductivity(avg.)	0.015 mS/cm
Accuracy salinity	+/- 0.75 (PSU)
Temperature range	-1°C to +40°C (30°F to 104°F)
Resolution temperature (avg.)	0.032°C (0.058°F)
Accuracy temperature	+/-0.1°C (0.18°F)
Depth range	customer specified
Standard depth ranges (Customer specified)	100 m, 500 m, 1200 m, 2000 m
Resolution depth (avg.)	0.03% of full scale (FS)
Accuracy depth	+/-0.4% of selected range
Accuracy conductivity	+/-0.8 mS/cm
Response time depth	Immediate response
Response time temp.	20 seconds
Clock	Real time clock.  Accuracy +/-1 min/month
Sampling interval	In second(s), minute(s) or hour(s)
Number of different sampling intervals	1 to 7 (logger can be programmed with one or up to seven different intervals. If multiple intervals are used, number of samplings are defined for each sampling interval).
First recording	At once or at any future time
Computer interface	Communication box, serial or USB
Battery life	4 years**
Data retention	25 years
Attachment hole	0.9 mm (in diameter)***

 

* Depth can optionally be skipped (DST CT).
** For sampling interval of 10 minutes or greater.
*** If the plastic protective housing is used, attachment hole is 6 mm.
Specifications may change without notice.