Thermalinc brings you infrared temperature sensors . As discussed earlier heat is transferred from a higher to a lower temperature.
Heat also flows in all directions unless channeled controlled or directed.
The rate of heat transfer depends on the physical caracteristics of the heating equipment used, the medium used to transfer heat, and the temperature difference between the source of the heat and the substance to which the heat is imparted. Heat is transferred by conduction when the heat source is in direct contact with the object to be heated. For example, a pan placed on a hot stove changes temperature rapidly by conduction. The pan is in direct contact with the hot stove and the better the contact with the stove the faster the temperature conducts into the pan. Conduction occurs in liquids, solids and gases.