DuoTube Heater

The Casso-Solar Technologies’ Duo-Tube TM is available with a dual coat integral gold reflective coating or an integral white refractory that directs the infrared energy to the product without the need for external reflectors.

Both the gold coating and the white refractory provide for maintenance free service.

The gold is the most efficient reflective material for all infrared energy, as it will not oxidize like most other metallic reflectors and is recommended for applications for extended heater life with heater temperatures of up to 1400 deg F.

The white refractory, slightly less efficient than the gold coating, will provide a wider emission spectrum and is suitable for extended life applications with heater temperatures of up to 1750 deg F.

Heaters are maintenance free during their lifespan.

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Contact our Sales Team to discuss our extensive offerings and find out how we can deliver equipment custom-designed for your needs.


  • Horizontal or vertical operation
  • Custom wattage and voltages
  • Fast Response
  • Low inrush current
  • Design Flexibility
  • Easy to control


  • Dual Heavy Wall Quartz: 33 mm x 15 mm
  • Maximum Heated Length: 138" (3505 cm)
  • Mounting: Easy-install snap-in mounting clips provided with heaters at no extra charge
  • Peak Wavelength: 2.4-2.6 microns at 1750 deg F (920 deg C)
  • Maximum Coil Temperatures: 1400 deg F (760 deg C) on Gold heaters without cooling air and 1750 deg F (920 deg C) with cooling air
  • Wavelength Range: 2.4- 6 microns, peak adjusted by emitter temperature
  • Mode of Operation: Horizontal to 138" (3505 cm) and Vertical to 24" (61 cm)

Industries & Applications

  • Glass Processing
  • Glass Lamination
  • Paint Drying
  • Fabric Heat-Setting and Drying
  • Thermoforming
  • Film Stretching
  • Web Heating and Drying

Duo-Tube Heater Part Number Configuration

DT-X-11111-22222-33333-4-555-6-777-[Special Description]

x = G = Gold; W = White

11111 = Overall Length - end cap to end cap - xxx.xx inches

22222 = Heated Length - xxx.xx inches

33333 = Total Wattage in Watts

4 = Construction Type - A through D, Construction Types E-K require detailed description

555 = Voltage

6 = 0 for No Thermocouple and No Thermowell; W for Thermowell Only, T for Thermowell and Thermocouple

777 = Lead Length in Inches