Abstract: A fluid cooled heat sensor device adapted to provide direct measurements of heat flux to be used for calculating thermal and skin burn predictions. The device comprises a copper disk which is inserted into an aperture in the top of a housing so as to define a fluid reservoir beneath the copper disk and within the housing. The housing further includes a fluid coolant entry port and fluid coolant outlet port for the ingress and egress of a suitable coolant fluid through the sensor device. At least one thermocouple is affixed to the back side of the copper disk and has an electrical connector wire extending therefrom and through the housing. The electrical connector wire is intended to be connected to suitable data collection equipment.