Aquatic & Fisheries DST Tilt Star-Oddi.com

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Three direction (3 D) tilt logger with sensors for tilt, temperature and depth 


Overview:
Sensors: Tilt (in 3-D), temperature and depth
Memory size: 29,000 measurements per parameter
Battery life: 2 years
Dimensions: 15 mm x 46 mm
Depth: Down to 3000m

Application examples:

  • Orientation studies of trawl doors and fishing gear
  • Fishing gear behavior at different depths
  • Tilt analyzing of ROVs, AUVs and underwater gear
  • Analyzing fish movements/direction over longer periods
  • Finding patterns in fish behavior, diurnal/seasonal to extend the knowledge on the ocean's resources

Features

  • The DST tilt measures ,in addition to temperature and depth, tilt in three directions
  • Tilt measuring range is 360°, the data for the tilt are shown in degrees °
  • Tilt accuracy is +/-2°
  • The tag can be programmed with different sampling intervals for tilt and temperature-depth.
The DST tilt data logger can be used for analysing orientation of fishing gear and underwater gear. Star-Oddi can offer a special protective housing for attaching to trawl doors and various underwater equipment.  It can also be used for behavior analysis of fish and other marine animals. For external fish tagging, Star-Oddi offers specially designed fastener kit where the DST is fastened to a plastic plate (for immobalising the tag). The DST tilt can also be implanted into fish.
                

More pictures taken on a Greenland halibut tagging cruise in Sept. 2008 are available at: http://www.nymand-lund.dk/img/dst/
Easy to use

DST 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 the user sets the sampling interval and start time of recordings.  After recapture of DST, the data is transferred to a computer, using the Communication Box and SeaStar software.  The logger can be re-programmed and reused as long as the battery lasts.  The data is shown in graph and table, each measurement has its own date and time.
         

Technical Specifications - DST tilt

Sensors Tilt in 3-D, temperature and depth
Size diameter x length
15 mm  x 46 mm
Weight in air/in water
19g / 12g
Memory 3 x 29K
Memory capacity
29,000 measurements per parameter*
Memory Management
-Custom programming
-Primary and secondary parameter
(uncoupling tilt and temperature-depth)
 
 
Memory type
Non-volatile EEPROM
Data retention
25 years
Resolution tilt 0.2°
Accuracy tilt +/-2°
Tilt range 360°
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)
 
 
Resolution depth
0.03% of full scale (FS)
Accuracy depth
+/-0.4% of selected range
Response time temp. Time constant (63%) reached in 20 sec.
 
 
Clock
Real time clock.  Accuracy +/-1 min/month
Sampling interval
User defined, in sec./min./hour
First recording
User defined start date and time
Computer interface
RS-232C 9 pin serial or USB
Battery life
2 years****
Attachment hole
0.9 mm in diameter


* Temp. and depth measurements can be skipped, increasing the memory size to 43,000 tilt measurements.
**Outside ranges available upon request.
***Customer specified.
**** For sampling interval of 15 minutes or greater.

Aquatic & Fisheries Research