Cartridge Heating Element
Our cartridge heaters deliver rapid, efficient heating and uniform heat transfer in a compact form. Constructed with durable stainless steel sheaths for long life, they meet global safety and quality standards (ISO 9001, CE, UL/CSA, RoHS)
Elekheat - China Cartridge Heater Manufacturer
A cartridge heater is a type of electric heating element that is typically cylindrical in shape and designed to provide concentrated heat in a specific area. It is often used in applications where precise heating and temperature control are required. Cartridge heaters are usually inserted into a hole or cavity in the object to be heated, such as in industrial machines, injection molds, or heating applications in laboratory equipment.
Features of Cartridge Heaters
Design: Cartridge heating elements have a compact and sturdy construction. They are often made with a metal sheath (like stainless steel) that houses a resistance wire. This sheath is typically filled with magnesium oxide (MgO) insulation material for efficient heat transfer.
Heating Medium: When electrical current passes through it, the resistance wire generates heat. The heat is then transferred through the sheath into the surrounding material.
Temperature Control: Cartridge heaters can be equipped with sensors and controllers for precise temperature regulation, making them ideal for applications where consistency and accuracy are important.
Elekheat-Cartridge Heater Type
Metric & Imperial (Standard) Cartridge Heaters
the common tubular heaters in various diameters and wattages.
Swaged High-density cartridge heaters
internally compressed during manufacturing to allow very high watt densities and improve heat transfer.
Split Sheath Cartridge Heaters(Expandable)
designed with a slotted/expandable sheath so they expand to fill the bore and maximize contact and heat transfer.
Multizone Cartridge Heaters
contain two or more independent heating zones (each with its own coil and lead), allowing different wattages or zoned heating
Square Cartridge Heater
have a square cross-section to fit milled slots; perform like round cartridges but clamp into flat surfaces
Flange/threaded cartridge heaters
threaded or flanged cartridges with built-in mounting; ideal for immersion applications (heating liquids/tanks) and allow easy replacement
Miniature cartridge heaters
very small diameters (down to ~3 mm) for space-constrained applications
Cartridge heater with thermocouple
include an integrated temperature sensor (thermocouple) within the heater to monitor sheath temperature
High temperature cartridge heaters
special alloys and swaged design to withstand up to ~1600 °F (870 °C) for extreme applications
Finned cartridge heater
Feature metal fins around the sheath to increase surface area and improve heat dissipation into air, ideal for air or gas heating systems.
Product Specifications Reference
| Parameter | Specification |
|---|---|
| Outer Diameter | ~3–25 mm (≈1/8″–1″) |
| Sheath Material | Stainless steel (304/316), Incoloy (Ni alloy), etc. |
| Wattage | 10 W up to ~5,500 W per element (depending on size) |
| Voltage | 120–480 VAC (AC, single- or multi-phase) |
| Watt Density | Up to ~300 W/in² (≈46 W/cm²) |
| Max Temperature | ≈760 °C (1400 °F) |
| Insulation | Compacted magnesium oxide (MgO) dielectric |
| Insulation Resistance | ≥100 MΩ (at room temp) |
| Dielectric Strength | Withstand voltage ≥1500 V |
| Lead Wire Insulation | Fiberglass or silicone rubber (rated to ~250–300 °C) |
| Tolerances | Diameter ±0.05 mm; Length ±2–3% |
Elekheat-customized services
Virtually any aspect of our cartridge heaters can be customized to your requirements. We can specify any diameter, length, wattage, voltage, sheath material, insulation, lead style, and terminal type for a custom heater. Special mounting features (flanges, screw threads, double-ended models) or multiple power zones can be added on request. We can even integrate temperature sensors (thermocouples/RTDs) or design multi-coil heaters for independent zone control. As Marathon Heaters notes, we offer a “wide range of customizable cartridge heaters” and can meet all non‑standard design needs, ensuring the heater exactly fits your application.
Application Areas
Food processing
Industrial heating
Plastic machinery
Food processing
Household appliances
Experimental equipment
Hydraulic equipment
Automotive equipment
ELEKHEAT Cartridge Heaters
ELEKHEAT cartridge heating elements are designed to deliver reliable and efficient heating for a variety of industrial applications. Made with a high-quality nickel-chromium resistance wire wrapped around a magnesium oxide (MgO) core, all encased in a durable stainless steel sheath, these heating elements provide excellent heat transfer and long-lasting performance. Whether you need to heat metal parts or liquids, ELEKHEAT cartridge heaters can be fitted with threaded bushings for additional versatility. Each model comes with terminal pins, making installation straightforward and efficient. With their high efficiency and reliability, ELEKHEAT cartridge heaters are the ideal solution for businesses looking to optimize their heating systems and improve operational performance.
Have a Question?
At ELEKHEAT, we’re here to provide the answers you need. Whether you’re looking for product information, technical specifications, or need assistance with maintenance, our team of experts is ready to help. Don’t hesitate to reach out—we’re committed to ensuring you get the support you need for the best heating solutions.
