13 mm ID tags

The Thelma Biotel 13 mm Acoustic transmitter is available in multiple power versions. These transmitters are intended for use where high output power and long transmitting life is crucial. The transmitters are suited for both manual tracking and automatic monitoring of larger fish or other aquatic animals.

The 13 mm Acoustic Transmitters are delivered both as Continuous Pingers and ID Transmitters. The customer specifies pulse delay or coded ID and type of encoding scheme, transmitting frequency and minimum and maximum random delay for ID transmitters.


Physical properties of 13mm Acoustic Transmitters
  ID-LP13 ID-MP13
Diameter  [mm] 13
Length  [mm] 27.9 33.3
Power output [dB re 1 uPa at 1m] 150 153
Weight in air  [g]  9.2 11.5
Weight in water  [g]  5.5 7.1


Battery Lifetime for Coded Transmitters with 8 pulse code

Avg. transmit




battery life


battery life


Est (norm). Guar.* Est (norm). Guar.*
120 39 23 30


90 32 19 24 14
60 24 14 17 10
30 13 8 9 6

 *As batteries will vary in capacity with temperature etc, the lifetime is guaranteed to a minimum of 60% of the normal average operating time.