Infrared Heaters Information
How to Select Infrared Heaters
Infrared heaters use a reflective shield to direct radiant heat onto a heated surface. Common types of infrared heaters include metal-sheathed tubular heaters, quartz tubes, quartz lamps; gas fired catalytic, flat-faced panels and ceramic emitters.
Infrared flat panel heaters are used to heat objects via radiant heat transfer.
Infrared heater elements are replacement heater elements used with radiant flat panel heaters and radiant reflective heaters. Replacement elements are of the same types and configurations used in full heating systems.
Infrared reflective process heaters use a reflective shield to direct radiant heat onto a heated surface. Many infrared reflective process heaters are so precise that heat can be directed to pinpoint locations. Infrared reflective process heaters are used in food service, as well as in a variety of other applications.
Important parameters to consider when specifying infrared heaters are maximum sheath temperature, maximum AC voltage, watts, and maximum watt density.
- Maximum operating temperature is the maximum temperature that the sheath covering the heater may reach. The maximum sheath temperature does not represent the maximum temperature that a heated substance may reach.
- Maximum AC voltage represents the maximum AC voltage the heater can use.
- Watts represents the available wattage available from the heater.
- Maximum watt density is the amount of wattage per square inch that the heater is capable of delivering. Watt density is calculated by dividing the available wattage by the heated area. Watt density is a good measure of the heater's ability to quickly heat a substance. High watt density heaters should not be used with extremely viscous materials, materials that are not well-circulated, or explosive/volatile materials due to risk of fire.
Sleeve / Sheath Material
Most infrared heater types will have a protective sheath that covers the heating elements. Many IR heaters will be available with many choices of sheath material. Sheath material for infrared heaters includes aluminum, brass, copper, iron, nickel alloy, stainless steel, and steel.
Features commonly found on infrared heaters include cooling options, corrosion resistance, cryogenic use, explosion proof housing, internal temperature detectors, UL approval and weatherproof housing. Corrosion resistant infrared heaters are suitable for use in a corrosive or chemical environment. Infrared heaters with explosion proof housings have housing designed to withstand explosions, protecting the materials within. This classification may also include housings, which can withstand sparking and flames.
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Band heaters are ring-shaped heaters that clamp onto a cylindrical object and heat via conductive heat transfer.
Cartridge heaters are cylindrical devices generally inserted into a heated substance.
Circulation heaters are used primarily to heat moving, flowing, or circulating fluid streams. Fluid flows through the heater, which transfers heat to the fluid stream. Any liquid or gas is generally acceptable for use with a circulation heater.
Cylindrical Ceramic Fiber Heaters
Cylindrical ceramic fiber heaters consist of an iron-chrome-aluminum (ICA) heating element and a thick layer of ceramic fiber insulation within a cylinder-shaped housing.
Drum heaters are used to heat containers of viscous materials. They can be wrapped around or placed inside containers that hold substances such as wax or grease.
Duct heaters are used to heat moving gas streams.
Explosion Proof Heaters
Explosion proof heaters are constructed with housings that can withstand explosions, protecting the materials being heated. This classification may also include housings, which can withstand sparking and flames.