Profile: International Thermal Instrument, Inc. is a designer and manufacturer of thermal instruments. Our product line includes heat flux transducers, calorimeters, radiometers, reactors, geothermal meters, and thermal conductivity analyzers. We also provide thermoelectric calorimeters, geothermal heat flux transducers, heat loss detection systems, thermal conductivity analyzers, flame intensity calorimeters and thermoelectric differential radiometers. Our model GHT-1C geothermal heat flow transducer measures directly, local heat fluxes in the earth. Bi-directional, steady-state, and transient heat flow may be sensed quantitatively and displayed upon any standard millivolt recorder. Our thermal flux meter is a solid state, flat-plate transducer designed to measure heat flow directly. This meter is placed upon any surface through which heat flow is to be measured.