Furnace with four tubes
LECO Tube Furnaces

Tube Furnaces

The LECO Cornerstone TF Tube Furnaces are versatile, energy-efficient resistance furnaces designed for baking crucibles to reduce contaminants that would interfere with analytical results.

Features

  • Long-life molybdenum disilicide heating elements have an operating temperature range of 800°C to 1350°C
  • Integrated digital furnace controller displays set point or actual temperature and provides overtemperature protection
  • TF4 Quad Tube Furnace system has six heating elements
    • Allows operator to burn off crucibles in four combustion tubes for demanding, high-volume installations supplying two to four units
  • TF2 Dual Tube Design has four heating elements
    • Efficiently supplies lower volume installations of one to two systems

The table below illustrates the impact of preheating 528-018 Crucibles on carbon and sulfur results of a high purity iron reference material certified at 5 ppm carbon and 2 ppm sulfur (1250°C for 15 min).

Analysis # Baked Not Baked, Not Touched Baked, but Touched
C ppm S ppm C ppm S ppm C ppm S ppm
1 4.6 2.5 13.5 3.1 40.1 3.9
2 4.6 2.0 12.3 3.8 24.4 3.7
3 4.8 1.8 11.5 3.2 24.6 3.5
4 4.9 1.5 12.5 3.2 22.9 3.8
5 5.8 2.7 12.8 3.8 34.4 3.3
6 4.8 2.5 12.6 3.8 22.8 4.4
7 4.5 2.2 11.6 4.1 41.5 3.8
8 3.6 1.5 18.5 2.3 21.6 3.7
9 6.0 2.0 12.0 3.9 32.5 4.2
10 6.0 1.6 16.0 4.2 31.4 4.3
Average (ppm) 5.0 2.0 13.3 3.5 29.6 3.9
Standard Dev. 0.75 0.45 2.20 0.59 7.40 0.34

The new furnace design and increased crucible capacity use 60% less energy than the previous models for significant savings in operating costs. The chart below exhibits the differences in operating costs while operating the various systems at 1350°C, considering continuous operation with a full load of crucibles.
Tube Furnace Efficiency Comparison, comparing power consumption and costs
LECO Tube Furnaces

Models

TF4

Quad Tube Furnace

TF2

Dual Tube Furnace

Instrument Brochures

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