A calorimeter is always referred to as a precise scientific instrument, not a common tool.

Scientific Device

It measures heat in both physical states changes, like melting, and chemical reactions.

Physical and Chemical

Commonly used in scientific contexts; may be unfamiliar in everyday conversation.

Specifically points to its use in determining the energy content of foods.

A type used in nutrition to measure the energy of food by burning it under controlled conditions.

It's a specialized tool in nutrition science, not for cooking or preparing food.