TDR tags are the choice for studies where high-volumes of data are needed. These tags must be physically recovered. The Mk9 series has been providing reliable data for 10 years. The TDR-Mk9 has been deployed in thousands of fish. [more info]

Additional sensors including 3-D accelerometers and magnetometers, stomach temperature and user-customized sensors are supported by the TDR10 series. [more info]