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.

Abstract: A thermograph adapted to be pre-loaded with chart paper upon which shipping information can be written, and comprising an instrument unit enclosed in an expendable container for automatic operation and security assured by a seal, the instrument being electro-mechanical wherein solid state circuitry horoligically controls a prime mover to advance the chart on a time basis and including a chassis over which the chart is guided onto a spool journaled therein, and a spool drive carrier depending from the chassis and keyed into alignment with and having a motor and gear drive to the spool.

Abstract: A thermograph adapted to be pre-loaded with chart paper upon which shipping information can be written, and comprising an instrument unit enclosed in an expendable container for automatic operation and security assured by a seal, the instrument being operated horologically in combination with a thermometer and all of which is electro-mechanical wherein solid state circuitry powers prime movers to advance the chart on a time basis while servo positioning a recording stylus by means of interval pulses, and responsive to a temperature sensing transducer means cooperating with the solid state circuitry comprised of a comparator means, and discriminator means operable to actuate switch means to "power-up" or "power-down" prime movers that position said stylus according to temperature sensed by said transducer means.