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Ease of observation and operation and configurable for horizontal or vertical use.

Product Selection

ModelZoneHeating ZoneTube O.D.Electrical
HTF55122A-1Single12 in.0.75 – 1 in.120V 50/60Hz
HTF55322A-1Single12 in.1 – 3 in.120V 50/60Hz
HTF55322C-1Single12 in.1 – 3 in.208/240V 50/60Hz
HTF55342C-1Single24 in.1 – 3 in.208/240V 50/60Hz
HTF55347C-1Three24 in.1 – 3 in.208/240V 50/60Hz
HTF55667C-1Three36 in.3 – 6 in.208/240V 50/60Hz



  • Moldatherm LGO heating element modules for superior radial and linear temperature uniformity and fast heatup and cooldown.
  • Long-life, energy-efficient elements require little or no maintenance.
  • Unique cabinet design achieves lower exterior surface temperature.
  • Heat-reflecting element support assembly creates two highly effective insulating air spaces.
  • Compact cabinet with high temperature-resistant painted finish.
  • Accepts interchangeable Moldatherm tube adapters.
  • Long-life Platinel II thermocouple(s) with 10ft. compensated lead wire and polarized plug.

Three Zone Models

  • Three independent power circuits (zones) with independent thermocouples for control references.
  • Full adjustment of each zone over entire operating range to 1200°C.
  • Center zone uniformity achieved and operating length maximized through adjustable profiling of end zones by independent controller.
  • Temperature uniformity achieved with independent setpoint of end zones higher or lower than center.


Thermo Scientific Lindberg/Blue M 1200°C Split-Hinge Tube Furnace Product Brochure