DST centi -TD logger
Small underwater Temperature and Depth (TD) logger with long battery life and large memory

 

DST centi series include:

  • DST centi (TD logger  with 174,000 measurements in total)
  • DST centi-ex (TD logger  with 523,800 measurements in total)
  • DST centi-hp  (TD logger with up to 3000 m depth sensor)
  • DST logic (same as DST centi-ex + depth limit when the logger shall start recording)
  • DST centi-T  (Temperature  logger  with 87,167 measurements in total)

Overview
Sensors: Temperature and depth
Memory size: DST centi-ex 523,800 and &  DST centi 174,000  measurements in total 
Battery life: 5 years
Depth survival: Down to 3500m 

  

 

 


Related Products:
Data Storage Tags,Fish Archival Tags:
-DST micro 
-DST milli 
-DST CTD
-DST GPS Fish Tag

Underwater Temperature Recorders:
-Starmon mini 
-DST milli-T
-DST centi-T
 

The DST centi series is a small underwater data logger available with one or two sensors temperature and depth , for temperature and depth (pressure) logging.  Data is stored into a non-volatile memory.  All measurements are time related, utilising a real time clock inside the DST.  The advantage that DST centi has over the DST milli small TD logger, is that it has longer battery life, and memory size can be extended to 261,916 measurements (DST centi-ex). However it's larger in size.
 

Programming Options
The user selects the sampling interval when starting the loggers.  With default programming, depth and temperature is recorded as pairs. An option when programming a sampling interval in the software, is to have more frequent samplings for either the depth or temperature. For example if the depth is of more interest, a more frequent sampling interval can be set for that parameter, making it a primary parameter. That way the majority of the memory size can be used either for depth or temperature. 

If the logger is programmed with a single interval, it records at the same interval through the whole measurement period.  An option is to select mulitple intervals within a measurement sequence.  That way the recordings automatically shift to a different interval within the measurement period.  Up to 7 different sampling intervals can be defined within a measurement sequence.  This is especially useful when more frequent measurements are needed at a certain time period, for example during spawning period of fish. 

DST logic
The DST logic unit allows scientist to choose a depth limit when the DST logger shall start recording depth-temperature. This means, while above the predetermined depth, the logger is not storing the measurements, saving the memory and battery life.  As soon as the logger gets below certain depth it is triggered to begin storing the measurements in its memory.  Therefore, the whole memory can be used for measurements within the specified depth range, and not wasted on recordings above surface.  This is particularly useful for scientist conducting research on fishing gear, where the logger spends considerable time on the deck, or on marine animals which spend much time at or above the surface (seals and seabirds to name a few).


Features

  • Specially designed for tagging fish, for analysing fish migration, distribution, feeding behavior, vertical  and horizontal movements.
  • Ideal as a stand-alone logger for  environmental studies, for underwater temperature and depth recordings, especially on fishing gear.
  • Ideal as temperature and depth logger for mooring or profile applications.
  • Available as a temperature recorder only, double increasing the memory.
  • Weight is only 19g in air and 12g in water.
  • Size is only 15mm x 46mm.
  • Temperature range -1°C to +40°C (30°F to 104°F), outside ranges available upon request.
  • Depth range can be selected up to 3000m (300 bar).
  • Long battery life of 5 years (typical).

Applications
DST centi/centi-ex is specially designed for tagging fish, for analysing fish migration, distribution, feeding behavior, vertical  and horizontal movements.  The tag can be used externally or internally (implanted into the body cavity) on fish.  If tagged internally, Star-Oddi can deliver the tag with a plastic tube attached.  The plastic tube hangs out to the exterior of the fish, and can easily be identified by fishermen.  For external attachment on fish, Star-Oddi can provide special wire fasteners.  DST centi is ideal for research on other marine animals as well (birds, crustaceans or reptiles) .  The recaptured DSTs provide valuable information on the behavioral patterns of the tagged animal.  For recapture and return purposes, customers 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 centi is also ideal as a stand-alone underwater temperature logger for recording depth and temperature in ocean/freshwater environments.  The DST can be fastened to fishing gear or other underwater equipment, collecting valuable data.  Star-Oddi offers a protective housing for the DST centi, made of polyurethan plastic.  Examples of research projects for the DST centi is within the fields of fisheries research, marine biology and oceanography.

 


Easy to use

DST centi series is supported by the SeaStar software for Windows, and a communication box which connects to a PC computer.  All communications and data transfer is wireless via the communication box.  DST is inserted into the box for establishing communication, using the SeaStar software.  Before use of the DST, the user sets the sampling interval and start time of recordings.  After recapture of DST, the data is retrieved to a PC computer, using the communication box and SeaStar software.  The logger can be re-programmed and reused as long as battery lasts. 

 


 

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 the supporting software (SeaStar). 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 - DST centi/centi-ex/centi HP

Sensor Temperature and depth/pressure*

Size (diameter x length)

15 mm  x 46 mm

Weight (in air/in water)

19g / 12g

Memory capacity (centi)

 

Optional memory increase
(centi-ex)

174,000 measurements

523,800 measurements
(divided between the two sensors)

Data resolution

12 bits

Memory type

Non-volatile EEPROM

Data retention

25 years
Depth range
DST centi/centi-ex
HP (high pressure)
30 m, 50 m, 300 m, 800 m
1500 m, 3000 m

Temperature range

-1°C to +40°C (30°F to 104°F)**

Resolution temperature

0.032°C (0.058°F)

Accuracy temperature

+/-0.1°C (0.18°F)
Response time depth Immediate
Response time temp. (time constant 63%) 20 seconds

Depth survival

Up to 3000 m (user defined)

Clock

Real time clock.  Accuracy +/-1 min/month

Sampling interval

User defined in second(s), minute(s), hour(s)

First recording

Any future time (user defined in software)

Computer interface

RS-232C serial or optionally USB

Battery life

5 years***

Attachment hole

0.9 mm (in diameter)****

* Depth/pressure measurements can be skipped (DST centi-T), double increasing the memory size.
**Outside ranges available upon request.
*** For sampling interval of 5 minutes or greater.
 

Specifications may change without notice.
 

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