Wildlife Computers Mk9 Time-Depth Recorders (TDR-Mk9) are small archival tags best designed for studies involving marine animals where the tag and/or animal can be recovered.
Key advantages of the TDR-Mk9 include:
The TDR-Mk9 measures depth, temperature, and light-level and also differentiate wet or dry conditions at a user-configured sampling interval.
Light-level and a second temperature sensor can be added to a sensor stalk making it suitable for both external attachment and internal implantation. TDR-Mk9s have been used on seals, penguins, otters, large pelagic fish, and many other applications.
Below are the general physical specifications of TDR-Mk9 tags.
|Attachment Type||Surgically-implanted or externally mounted***|
|Sensors||Depth, Temperature, Light-level, Wet/Dry***|
|Depth Sensor Range||0-200 m, 0-1700 m, 0-2000 m***|
|Depth Sensor Resolution||0.1 m, 0.5 m, 1 m***|
|Depth Sensor Accuracy||± 1% of reading|
|Temperature Sensor Range||-40 °C to 60 °C|
|Temperature Sensor Resolution||0.05 °C|
|Temperature Sensor Accuracy||± 0.1 °C|
|Light Sensor (when installed)||5 x 10-12W cm-2 to 5 x 10-2W cm-2|
|Operating Temperature Rating (°C)||-20 °C to 50 °C|
|Conductivity Operational Limits||0.1 S m-1 to 5 S -1|
|Recommended Storage Temperature Range (°C)||-20 °C to 5 °C|
|Length, Width, Height, Weight, Wet/Dry Sensor||***|
|Maximum Deployment Length||Over eight years based on sampling depth, tag temperature, external temperature, and light every 30 seconds. Maximum deployment length is limited by memory thus depends upon the user-programmed sampling rates.|
*** indicates the specification is dependent upon the configuration model