CTT Transmitters – Coded Temperature Telemetry

Sonotronics temperature telemetry transmitters transmit their current temperature by varying the pulse interval time between pings. For example, a tag at 0 deg Celsius may have an interval time of 700ms, and at 25 deg celsius it may have a pulse interval time of 1450ms. Temperature tag instruction sheets are sent with temperature tags. The temperature transmitters have an accuracy of +/-2 deg C and a resolution of.5 deg C. The transmitters can be user calibrated for accuracies greater than +/- 2 deg C.

Temperature Telemetry Transmitters

CTT: Range up to 1km+

Model Length Diameter Weight
CTT-83-2-I 53mm 16mm 9g 19g 14 months
CTT-83-2-E 49mm 16mm 9g 20g 14 months
CTT-83-3-I 62mm 16mm 10g 22g 36 months
CTT-83-3-E 63mm 18mm 8g 23g 36 months


  1. The typical rule of thumb is to use transmitters that have a weight in water that is 1.5 – 2% of the fish weight in air. Weight in O2 (air) is put only as additional reference.
  2. -E is the extension denoting external mount, -I denotes internal implant. You must specify internal or external when ordering transmitters.

CTT Manual
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