3D tilt sensor with temperature sensor & pressure sensor
DST tilt - subsea tilt logger with temperature & pressure sensors
Tilt (3D), temperature and pressure
- Ideal for monitoring orientation of underwater gear or movements of marine animals
- Available with an adjustable housing that keeps the logger fixed inside
- Tilt measurements based on an accelerometer and measured in relation to earth's gravity
- Option for burst measurements (5 recordings per second) for tilt & acceleration
- Acceleration displayed in the supporting software together with tilt, temp & depth
The subsea DST tilt sensor is a miniature data logger that measures and records temperature, depth (pressure) and tilt (in three directions) in relation to earth's gravity field. Tilt measuring range is +/-90° for each of the axis X, Y and Z. The tilt angle data are shown in degrees. Recorded data is stored in the logger‘s internal memory with a real-time clock reference for each measurement.
The DST tilt is supported by the SeaStar software and the Communication Box which serves as an interface between the logger and a PC. Communication between the logger and the Communication Box is wireless when sitting in the box.
In SeaStar, the user sets the start time, start date and sampling interval before starting the recorder. Up to seven different intervals can be set for the same measurement sequence. This is especially useful when more frequent measurements are needed at a certain time period. It is possible to have burst measurements for the tilt sensor where 5 measurements are recorded per second.
With default programming depth, temperature, and tilt are recorded at the same time. Optionally TD (Temp-Depth) and tilt can be uncoupled, set as primary and secondary parameter pairs/parameters with different sampling frequency. That way memory partitioning can be customized according to individual preferences.
When the DST has been recovered, recorded data is uploaded to SeaStar where results are displayed both in graphic and tabular form. Since the tilt sensor is in fact an accelerometer the acceleration data are also displayed in the SeaStar software. Therefore both tilt angle data in degrees and acceleration data in m/s2 (meters per second per second) are shown.
After retrieving the data, the DST can be re-programmed and reused as long as the battery lasts.
A set of Communication Box and SeaStar software needs to be purchased with the first order.
For more information about accessories please click here.
Examples of Application
DST tilt is both used for analyzing movements and behavior of fish and marine animals as well as for studying various underwater gear.
The DST tilt is suitable for various studies:
- Fishing gear studies (trawl doors, nets, lines)
- Tilt monitoring of fishing traps and cages
- ROV and AUV orientation studies
- Fish and marine animal tagging
- Orientation of gethermal boreholes
- Any other field where tilt angle monitoring is required
Star-Oddi offers the Adjustable Housing for DST tilt, specially designed to immobalise the tilt sensor and protect the logger against impact. It has flexible mounting options, making it easier to attach to gears and cables. More details here. For external tagging of fish Star-Oddi can provide a special tag holder kit.
|Sensors||Tilt (3-D), temperature, pressure*|
|Size (diameter x length)||15mm x 46mm|
|Housing material||Alumina (Ceramic)|
|Weight (in air/in water)||in air: 19g|
in water: 12g
|Memory type||Non-volatile EEPROM|
|Memory capacity||43,598 measurements per channel|
(if all parameters are recorded simultaneously)
|Memory capacity bytes||392,379 bytes / temperature-pressure 3 bytes, tilt 6 bytes|
|Memory management||- Custom programming|
- Primary and secondary parameter
|Data resolution||12 bits for TD, 15 bits for tilt|
|Temperature resolution||0.032°C (0.058°F)|
|Temperature accuracy||+/-0.1°C (0.18°F)|
|Temperature range||-1°C to +40°C (30°F to 104°F)***|
|Temperature response time||Time constant (63%) reached in 20 sec.|
|Standard depth ranges||0.1m-50m, 0.1m-100m, 1m-270m, 5m-800m, 5m-1500m, 10m-3000m|
|Depth resolution||0.03% of selected range|
|Depth accuracy||+/-0.4% of selected range between 50m and 270m range, +/-0.6% of selected range between 800m and 3000m|
|Depth response time||Immediate|
|Data retention||25 years|
|Clock||Real time clock |
Accuracy +/-1 min/month
|Sampling interval||User programmable|
|Number of different sampling intervals||1 to 7 different intervals within a measurement sequence|
|Communications||Communication Box, RS-232C 9 pin serial or USB|
|Attachment hole||0.9 mm (in diameter)|
|Tilt range||+/-90° (180° span)|
|Battery life||4 years**|
** For sampling interval of 10 minutes; tilt, temperature and pressure recorded simultaneously.
*** Outside ranges available upon request.
Specifications may change without notice.