Cartridge heaters are cylindrical heating elements inserted into drilled holes to provide localized
heat. They consist of a nickel-chrome resistance wire wound around a ceramic core, encased in
a stainless-steel sheath, with magnesium oxide (MgO) insulation for high thermal conductivity.
High-Density Cartridge Heaters
Overview: High-density cartridge heaters deliver intense heat (up to 100 W/in2) in compact
spaces, operating at temperatures up to 1400°F (760°C). They are designed for high-wattage
applications requiring precise and concentrated heating.
Applications:
● Mold and die heating in plastic processing
● Hot stamping and sealing
● Medical equipment sterilization
● Aerospace component manufacturing
Benefits:
● High watt density for compact heating
● Rapid heat transfer and response
● Durable stainless-steel construction
● Customizable lengths and diameters
Overview: Medium-density cartridge heaters (up to 50 W/in2) are suited for less demanding
applications, operating at temperatures up to 1000°F (538°C). They balance performance and
cost, making them versatile for general-purpose heating.
Applications:
● Packaging machinery
● Hot runner systems
● Food processing equipment
● Laboratory heating devices
Benefits:
● Cost-effective with reliable performance
● Good thermal efficiency
● Easy to install and replace
● Wide range of sizes and terminations
Technical Insight: High-density heaters use tightly compacted MgO for maximum heat transfer,
while medium-density versions prioritize longevity and cost-efficiency.
