infrared lamps
Infra Red 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. Infra Red is used for heating, drying, baking, melting, shaping/moulding, activation or bonding.
INFRA RED EMITTERS OFFER INTELLIGENT HEAT WITH THE FOLLOWING ADVANTAGES
- Infrared Emitters have short switch-on and switch-off response times
- Extreme accuracy in temperature control is possible when using Infra Red
- Infra Red heaters can heat precisely where its required
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Infra Red Emitters can be tailor made to client's
requirements -
Infra Red Emitters can be adjusted precisely to the material
properties - Infra Red heating technology saves energy and increases the process speed
ROUND TUBE EMITTERS
Short wave Infra-Red Halogen Lamps
Double-ended infra red 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 infra red 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.
Halogen lamps
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. Infra Red Halogen 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 |
| Infra Red halogen technology | No blackening of the lamp 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 Infra Red 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 infra red emitters with higher radiation density and improved mechanical stability. A gold coating on infra red lamps reflects the radiation very well – effective radiation onto the product is almost doubled.
The infra red heaters are available as short-wave, medium-wave and fast response medium-wave infra red 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 Infra Red emitters are also available for special geometries, e.g. omega-shaped, bent or as a complete Infra Red 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.
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
With the development of 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.
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
Manufacturing Infra Red 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.
Heraeus carbon Infrared heaters can be built as complete Infra Red systems.
Carbon Infra Red 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 | 60 W/cm | 30 W/cm |
| Max. heated length | 5000 mm | 1500 mm |
| Cross-section | 34 x 14 mm | 19 mm |
| Filament temperature | 1200°C | 1200°C |
| Wavelength | 2μm | 2μm |
| Max. power | 110 kW/m2 | 85 kW/m2 |
| Response time | 1 – 2 s | 1 – 2 s |
WAVELENGTH RANGES OF DIFFERENT EMITTER TYPES
The wavelength of an Infra Red 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 Infra Red (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 Infra Red emitters. When selecting an Infra Red Emitter for an industrial process, wavelength and power are among the most important parameters that are taken into account.
