Cartridge heater is cylindrical electrical heating elements. Protected with a stainless steel sheath, their watt density can reach 63W/cm² and their operating temperature can go up to 800°C (1472°F). Mostly cartridge heater is used for heating up solids such as injection presses heating plates or various tools; cartridge heater can also be used for heating up water or gases under certain conditions.

Widely used for manufacturing plastic and rubber parts in the car industry or in the food processing industry, etc. Cartridge heaters are also commonly found in the chemical, electronics, medical equipment, packing and nuclear industries. Various cartridge heater technologies are available. The choice of technology will depend on technical specifications required and the application.

The heating part of the core of the cartridge heater is a nickel-chromium heat-resistant alloy wire, which is wound on a magnesium oxide core rod with excellent insulation and thermal conductivity. After the main body of the cartridge heater is completed, the fixing piece or thread can be installed according to the installation needs.