Patent ID: 7014357

Claim:
A sensor for detecting icing conditions in an airflow caused by presence of liquid moisture in such airflow, the sensor including a flow housing having a channel providing at least one flow path configured to provide a known mass airflow rate therethrough at relative airflow speeds, at least one probe mounted in the at least one flow path such that the airflow impinges on the probe, a power source for heating the probe, and a sensing circuit coupled to the probe for determining changes in a function which is dependent upon the presence of liquid moisture striking the probe, the sensing circuit providing an output indicating changes in the function, wherein said sensing circuit comprises a bridge circuit, and wherein the probe comprises a first probe and has a known resistance relationship with temperature, a second probe mounted in a second airflow path that is branched from the at least one airflow path and which has airflow that is substantially free of liquid moisture, and wherein the bridge circuit compares temperatures between the first probe and the second probe.