Passive electronic identification and temperature monitoring system. Progress report, January--December 1976. [For monitoring temperature in livestock]

A six-digit microwave telemetry system is described in which a passively powered transponder can be remotely interrogated to report temperature and identification. This preprototype system was developed to be used to identify livestock and monitor temperature by implanting the transponder unit under the skin of each animal. Expected benefits include early warning of disease or other stress conditions and improved animal management.