There is good thermal contact between the heat flux meter and the wall or roof being tested.

When two systems in thermal contact are at the same temperature no heat transfers between them.

This cools the heat sink and whatever it is in direct thermal contact with.

This permits the sensing wire to move while still remaining in good thermal contact with the process.

A spring pushes the thermostat against the bottom of the bowl for good thermal contact.

The material is placed in thermal contact with the environment being refrigerated.

The air cell is mounted so as to minimise thermal contact with the mass of the head.

When two systems come into thermal contact, they exchange energy through the microscopic interactions of their particles.

Fires give off heat, or the process of energy transfer from one body or system due to thermal contact.

This improves the thermal contact, and so increases the rate at which heat leaves the tray.