Certain industries and research areas have unique requirements that cannot be met by off - the - shelf calibration furnaces. Custom - built thermocouple calibration furnaces are designed to address these specialized needs. For example, in a research project studying the behavior of materials under extreme magnetic fields and high temperatures, a custom furnace may be built with special materials that are non - magnetic and can withstand both the magnetic forces and high heat. The furnace can be designed to have a specific chamber size and shape to accommodate the experimental setup. In the food industry, for calibrating thermocouples used in specialized cooking processes like sous - vide, a custom - built furnace can be tailored to the specific temperature range and accuracy requirements of sous - vide cooking. These custom - built furnaces often incorporate advanced features based on the client's needs, such as highly precise multi - zone temperature control, rapid heating and cooling capabilities, and specialized data - logging functions.