High-density cartridge heaters

Electro-Therm cartridge heaters can reach temperature of up to 800°C. In terms of power density, we advise our customers not to exceed 40 Watts per square centimeter. We can also offer those cartridges with different wattages. As an option, Electro-Therm cartridges can be equipped with a Thermocouple or Thermistor to control and limit temperature.

Construction:

- AISI 321 stainless steel body, surface ground and calibrated.
- NiCr 80/20 resistance wire.
- Highly compressed by shrinking.

For special requirements, please contact us.

Recommendations:

Our cartridge heaters are carefully tested, piece by piece. However, their lifetime depends essentially on working conditions.

Here are 10 important points to keep in mind, to ensure that your machine is working properly.

• Cartridges should be placed in calibrated holes using a reamer.
• Lifetime also depends on the load, so it's better to have more cartridges, but less powerful ones.
• The entire cartridge must be in contact with the metal (i.e. no lack of metal in the bore), with only the ceramic head protruding.
• The hole should be clear if possible, to make it easier to insert or remove the cartridge. At the end, the through hole can be smaller in diameter. It also improves heat transfer, but be careful not to apply it to the ceramic head or wires.
  
• Our anti-friction, heat-resistant products make it easier to fit and remove cartridges.
• Electrical connection cables must be protected against fluids such as water, lubricant, oil, plastic, etc., which could cause leakage currents or ignition at the conductor exit.
• Temperature control must be ensured by a good temperature regulator, if possible with modulated action, or by any other electronic power control system.
• To avoid excessive thermal inertia which could cause the heater to overheat, place the regulation sensor approximately 10mm from the cartridge. Cartridge heaters must be stored in an absolutely dry room, or in hermetically sealed plastic bags.
  
• When using several cartridges close together, the distance between each one must be at least one diameter.
• Cables must be protected against vibration and shock at the cartridge output, to prevent damage.