Abstract: A thermograph system and precision temperature sensor wherein a continuous running default time-temperature recording is made and available for subsequent computer readout and printout, and a simultaneous select time duration recording that is started and stopped for documenting time periods during which critical temperatures are involved, characterized by LCD instant readout of the highest and lowest F° or C° temperatures throughout a selected duration recording or said default recording, with a Driver-receiver for compatible voltage differential data transfer to and from a personal computer for downloading of select-duration and alternately default time and temperature recording data.