Telemetry is information technology that allows the measurement and the transcription of information that is of interest to the designer of the system or to the operator. The word comes from the Greek words tele= which means far and metron= which means measurement. The systems that need instructions and data sent, also need the counterpart of the telemetry, the remote control, in order to operate.
The telemetry is typically referred to as wireless communication (the use of a system that uses radio frequency to implement the connection of data), but data can also be transferred via other media, such as telephone networks, the computer or through an optic link.
This technology is particularly necessary for large complex systems, because
monitoring, warnings and the recording of data for a secure and efficient
operation are automatic.
Telemetry is also used for patients (biotelemetry) who are at risk from
irregular heart problems, generally who are in a coronary ward. Measuring,
recording and transmission equipment is attached to these patients. Recording
data can be useful for the diagnosis of the condition of the patient, given
by the doctor. An alarm can call the nurse if the patient is suffering from
a serious or dangerous condition.