Infrared Lamps

Infrared has a wavelength just greater than that of the red end on the visible light spectrum but less than that of microwaves, and has a wavelength from about 800 nm to 1 mm. Infrared is used for heating, drying, baking, melting, shaping/moulding, activation or bonding.

INFRARED EMITTERS OFFER INTELLIGENT HEAT WITH THE FOLLOWING ADVANTAGES

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Infrared Emitters have short switch-on and switch-off response times

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Extreme accuracy in temperature control is possible when using Infra Red

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Infrared heaters can heat precisely where its required

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Infrared Emitters can be tailor made to client's requirements

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Infrared Emitters can be adjusted precisely to the material properties

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Infrared heating technology saves energy and increases the process speed

ROUND TUBE EMITTERS

Short wave Infra-Red Halogen Lamps  

Double-ended infrared Quartz lamps used as high-power and high-efficiency heat sources are employed in various industrial applications. The lamps are of the halogen type, which avoids blackening of the tube and consequently infrared depreciation during lifetime.These lamps can incorporate an embedded white reflector which allows focusing the infrared radiation to an object.

It is compact, clean and energy-efficient and can be used for a wide range of applications like heating, drying, curing, cooking etc.

Description

HeLeN lamps 
Infrared HeLeN glare reduction lamps have a coating to reduce the visible glare, improve the colour rendering and raise the infrared output.
They are highly economical, converting practically all the consumed electrical power into heat.
Heat transfer is not affected by draughts or air movement and is noise-free. There is no by-product of combustion or movement of air or dust, thus giving a cleaner environment, and no oxygen is consumed so no extra ventilation required. Infrared HeLeN glare reduction lamps comply fully with the IEC standards.

Applications – Zone heating in: factories, sports halls, exhibition halls, work areas, churches, large halls, warehouses, storage areas, garages, terraces, greenhouses, open air applications, stadiums, camp sites,etc.

Features Benefits
Instant heat Full emitted power within milliseconds after switch-on
No emissions or pollution Clean and environmental friendly
Quartz envelope for infrared halogen lamps Heat shock resistant and safe
90% of the energy is transmitted as infrared heat Efficient and economical heat source
Dimmable Output accurately controllable from 0 to 100% to match your needs
Infrared halogen technology No blackening of the bulb and so no depreciation infrared emission during life time.
Long lifetime Low maintenance
Same optical properties as light Heat can be focused by reflectors
Compact design Allows design of compact heat sources and systems

GOLDEN 8 EMITTERS

Heraeus Golden 8 infrared emitters are manufactured from high-quality quartz tubes and have a gold reflector for maximum efficiency. The unique Heraeus twin tube design (the “Golden 8”) provides the infrared emitters with higher radiation density and improved mechanical stability.

Description

The infrared heaters are available as short-wave, medium-wave and fast response medium-wave infrared emitters. This allows you to choose the optimal wavelength for the material to be heated. Dimensions and filaments of all the infrared emitters are manufactured to match the requirements.
Heraeus IR emitters are also available for special geometries, e.g. omega-shaped, bent or as a complete IR system.

Technical data Carbon twin tube IR emitter Fast response medium-wave twin tube emitter Short-wave twin tube emitter
Power density 18 / 20 / 25 / W/cm 80 W/cm
Max. heated length 1500 / 2000 / 6500 mm 6400 / 2400 mm 6400 / 2400 mm
Cross-section 18 x 8 / 22 x 10 / 33 x 15 mm 34 x 14 / 23 x 11 mm 34 x 14 / 23 x 11 mm
Filament temperature 800°C – 950°C 1400°C – 1800°C 1800°C – 2400°C
Wavelength 2.4 – 2.7 pm > 1.4 pm 1.0 – 1.4 pm
Max. power 60 kW/m2 150 kW /m2 200 kW /m2
Response time 1 – 4 min 1 – 2 s 1 s

 

EMITTERS WITH NANO REFLECTORS

In contrast to conventional reflectors, the new nano-reflector is not made of gold or metal oxides but of opaque quartz glass. Quartz glass is extremely resistant to heat, acid, alkaline solutions and other corroding substances. A gold coating on infrared lamps reflects the radiation very well – effective radiation onto the product is almost doubled.

Description

Measurements show that the reflectivity of opaque quartz material is about 60% to 70%. This is less than that of gold but comparable to a high-gloss polished aluminium reflector. However, an aluminium reflector will lose its reflectivity gradually as aluminium oxide forms on its surface, while no oxides are created on quartz glass.

The new reflector is located directly on the lamp and therefore does not need to be brought into the correct position first as is the case with external reflectors.

The QRC infrared emitter is continuously being developed further. A new development involves QRC emitters that can be precisely shaped to the contours of a product. In this way, the heat is guided directly to edges, burrs or corners – ideal for deburring or welding of three-dimensional plastic products.

INFRA RED SPECIAL LAMPS

Heraeus has developed special emitters for processes in which very small surfaces, edges or contours are to be heated. A common feature of all these emitters is their adaptation to the desired process with regard to shape, size and spectrum.

Description

Infra Red emitters can be Individually formed to match the requirements of the finishing process.

Heat can therefore be targeted to where it is required such as:

  • Joining, welding or riveting of plastics
  • Forming or bending of tubes
  • Drawing of glass or plastic fibres

Heraeus Noblelight manufactures Infrared emitters matching the geometry of the product.

With emitters manufactured in a variety of shapes or spiral form, metal or glass can be heated homogeneously.

Advantages of Special emitters:

  • Wattages designed to suit the application
  • Homogeneous heating
  • High wattages in small spaces
  • Switch on and off in seconds
  • Shorter heating times.
  • Penetrating form of heat transfer.

CARBON EMITTERS

Heraeus carbon infrared emitters CIR® feature a unique design of the heating filament that combines the effective medium-wave radiation with very short response times in the seconds range. The unique twin tube design of the Heraeus infrared emitter (the “Golden 8”) provides higher radiation density and improved mechanical stability. Carbon infrared heaters are also available as round tubes.

Description

Heraeus carbon IR heaters can be built as complete IR systems.

Carbon Infrared Emitter features:

  • High-quality quartz glass for good transmission and thermal stability
  • Carbon heating element with very short response time
  • Robust ceramic lamp base
  • Gold reflector for directed radiation and high efficiency
  • Twin quartz tube (the “Golden 8”) for high stability and double power, available in various lengths
Technical data Carbon twin tube IR emitter Carbon round tube IR emitter
Power density 80 W/cm 40 W/cm
Max. heated length 5000 mm 1500 mm
Cross-section 34 x 14 mm 19 mm
Filament temperature 1200 C 1200 C
Wavelength 2 pm 2 pm
Max. power 150 kW/m2 100 kW/m2
Response time 1 – 1 s 1 – 2 s

WAVELENGTH RANGES OF DIFFERENT EMITTER TYPES

The wavelength of an Infrared Emitter has a major influence on the efficiency of a thermal process. The better the emitted wavelength fits the absorption spectrum of the material to be heated, the more efficient the process. For instance, water absorbs best at about 3000 nm. Therefore, medium-wave and Carbon Infrared (CIR) Emitters are optimal to heat water and water-based coatings. The main emission of these emitters lies exactly within the range of the main absorption of water. Another important Emitter parameter is power, measured in W/cm (Emitter length) or W/cm2 (heated surface).

Due to the higher temperatures of the heating filaments, the power density of short-wave or Halogen Emitters is in most cases higher than that of medium-wave Infrared Emitters. When selecting an Infrared Emitter for an industrial process, wavelength and power are among the most important parameters that are taken into account.

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