University of St Andrews SMRU Instrumentation
SMRU Instrumentation
Sea Mammal Research Unit

Satellite Relay Data Logger (SRDL)

The 9000x SRDL, the latest version of our original Argos tag, provides detailed individual dive and haulout records.


SRDL isomorphic representation
  • Data relayed and locations computed using the global Argos satellite system
  • Relays an unbiased sample of detailed individual dive records
  • Sensors include depth, temperature and speed
  • Low Profile configuration also available (minus speed sensor)

TDR capability

Automatically retains a continuous record of sample data, which can be retrieved by bluetooth link if the tag is recovered.
  • Depth and temperature (4 sec sample rate)


  • Longevity: typically one year, but may be extended with software modifications.
    A lithium 'D' size cell provides approximately 85,000 full length Argos data transmissions.
  • Size: 10.5 x 7 x 4 cm
  • Weight: ~370 g

Further technical details: SRDL 9000x Specification (PDF)

For details of pricing and how to order, please see our Contact & Sales section.
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