Furnaces
Explore Box Furnaces for chamber-based heating or Tube Furnaces for process-tube and controlled gas-flow configurations.
Frequently Asked Questions
What is the difference between a muffle furnace, a box furnace, and a tube furnace?
Box furnaces heat samples in an enclosed chamber, while tube furnaces heat samples within a process tube. McQueen Labs lists Thermolyne™ muffle furnaces within its Box Furnaces category, including models for ashing organic and inorganic samples and heat treating small steel parts. Compare tube furnaces when your application requires defined heated zones or controlled gas flow. Check the individual model’s application guidance before choosing.
How do I choose the right furnace temperature and capacity?
Start with your required process temperature, then compare the model’s rated range and usable sample space. Thermolyne™ Small Benchtop Muffle Furnaces provide single-setpoint control to 1100°C; Thermolyne™ Industrial Benchtop Muffle Furnaces reach a maximum of 1200°C. For chamber furnaces, check internal dimensions as well as capacity. For tube furnaces, compare compatible tube dimensions, heated length, and the number of heating zones.
Which controller and safety features should I compare?
Choose a controller that supports your required heating stages, then review the safeguards listed for that configuration. Thermolyne™ Industrial Benchtop Muffle Furnaces offer B1 control with a single ramp and dwell, or C1 control with eight programmable steps. Listed safeguards include thermocouple break protection and a door switch that cuts power to the heating elements when opened. Also check overtemperature protection and electrical installation requirements for your selected model.
When do I need atmosphere control in a laboratory furnace?
Atmosphere control may be needed when your process requires an inert gas or must limit oxidation. For a tube-furnace setup, check the process tube, end seals, gas connections, and operating limits as a complete system. An air inlet or vent on a box furnace does not establish that it is gas-tight or suitable for vacuum operation. Confirm that the selected configuration supports your required atmosphere.
Where can I find furnace accessories and replacement components?
Browse Box Furnace Accessories and Tube Furnace Accessories, matching each item to your furnace model and part number. The Small Benchtop Muffle Furnace page lists separately available heating elements and thermocouples. McQueen Labs also offers Premium Large Muffle Furnace Accessories. Check included components before ordering additional items; the Industrial Benchtop Muffle Furnace description includes a ceramic hearth plate.