Abstract: A flow rate measurement and direction system including a number of self calibrating probes each having a sensor with two thermistors for providing signals related to the flow rate; and a connector for interfacing the sensor with a monitor, the connector including a memory for storing calibration data unique to each of the thermistors. The monitor includes a microprocessor for polling the memory and for extracting the calibration data, for converting the signals provided by the thermistors into calibrated signals by applying the extracted calibration data to the signals, and a routine for determining the flow direction.

Abstract: A measurement system including a plurality of self calibrating probes. Each probe has a sensor for providing a signal related to a physical parameter to be measured, and a connector for interfacing the sensor with a monitor. The connector includes a memory device for storing calibration data unique to the sensor. A cable interconnects the sensor with the connector. The monitor of the system includes a microprocessor for polling the storage device on the probe to extract the calibration data, and a software routine which converts the signal provided by the sensor into a calibrated signal and applies the extracted calibration data to the signal provided by the sensor.