Biotelemetry has long been used for environmental and life science research to study animal populations and behavior. The use of implantable bio-telemetric techniques makes it possible to record and study physiological variables during long-term experiments with a minimum disturbance to the animal. Fully implantable telemetric techniques greatly reduce the risk of infection associated with leads and catheters protruding from the skin. In this research the design and implementation of a completely programmable bio-implantable digital system which can measure two physiological signals extended over a period of time is considered. The proposed system consists of a standalone implantable transmitter unit and a receiving base station unit. The transmitter unit measures the physiological parameter converts it to an 8-bit digital data, sends it to the inbuilt Bluetooth transceiver which then wirelessly transmits the digital data to the base station. The system utilizes the power intelligently by turning on only when needed, the rest of the time it goes to sleep mode. The biotelemetry system proposed is simple, flexible and reliable, provides accurate, continuous measurement of physiological parameters of small freely moving laboratory animals such as mice, rats or rabbits. The absence of restraints during the collection of physiological data allows studying animals with minimal stress during a long period of time in their normal housing
