Traditional infrared heaters, middle wave


Elektrotermija produces a wide range of straight quartz glass infrared heating elements. Almost 40 years of experience and wide range of diameters of milky quartz glass tubes allow us to answer to most demanding requests in short delivery terms. Affordable price, fast heat-up and reliability are advantages for many industrial processes such as textile and food industry. Heating coils can be wound in various grades (FeCrAl or NiCr alloys) and various shapes. We can provide ceramic beads, end blocks, high temperature cables and other accessories.


  • Glass processing industry
  • Textile industry
  • Electric space heaters
  • Industrial proces heaters
  • Refrigeration defrost heaters
  • Microwave oven elements
  • Domestic and commercial cooking grills

Technical data

Type of heating

Infrared radiation - middle wave


Quartz glass
FeCrAl or NiCr heating wire filament


Standard range or acc. to customer specification

Tube diameter: Ø10, Ø12, Ø16, Ø20, Ø24mm
Wall thickness of tube: 1-2mm
Tube length: Max. 3000mm


Free standing in the air
Assembled into sheet metal reflector
Fixing to the object


Screws and nuts, tab terminals, nickel wires, connection wires with ceramic beads or silicon rubber hose


Single coil is standard, Twisted coil to prevent sagging
Connection at two ends
Milky tube is normal style
Round ceramic terminal end


Wave length: 2-4 μm
Heating penetration: 0.17-0.30mm deep under surface
Heating response time: 1 minute
Structure: Non full sealed - air can go in freely
Filament temperature: Max. 800°C
Surface load: 4-7 W/cm²
Power for single tube: Max. 9000W

Accessories: High temperature cables, Ceramic beads, Two pole ceramic terminal block 


  • Very low thermal expansion rate
  • Economical, cost efficient
  • Dimensions, power and voltage upon request
  • Resistance to high temperatures
  • High efficiency and energy saving
  • Light weight
  • Can be used in vacuum and air flow environments

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