A six month program to develop a rugged new device for monitoring the onset Of ice formation on surfaces of transportation vehiclesw roads, bridges and aircrafts, will be developed and a prototype will be labors atory tested. The novel gage and electronic system is partly based on the technology applied to measure conductivity of solutions. Based on existing technology, and already tested under high velocity flow conditions, the system hae excellent probability of success in this new application. It should also be usable in other icing measurement applications such as on marine and transmission structures. The major benefit will be the anticipation Of potentially hazardous icing condition to transportation units and the monitoring Of icing conditions on critical bridges, mechanical deslces,asqwell as icing on aircraft wings and potential ice ingestion into aircraft engines.