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MINERAL INSULATED STRIP HEATERS
THIN, RESPONSIVE HEATER SETS STANDARDS FOR PERFORMANCE AND DURABILITY
The MI strip heater is a thin, responsive heater that uses the most advanced heater construction techniques. A nickel-chromium element wire is embedded in Watlow’s exclusive mineral insulation material, which has a much higher thermal conductivity than the mica and hard ceramic insulators used in conventional heaters. This thin layer of insulation brings the element wire closer to the heater sheath. The result is heat flows easily from the element wire to the sheath allowing the wire to run cooler than conventional heaters and increasing heater life.
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MINERAL INSULATED NOZZLE HEATERS
FEATURING WATLOW’S EXCLUSIVE MINERAL INSULATION (MI) TECHNOLOGY
The MI nozzle heater from Watlow is a high-performance heater. The nozzle heater’s performance and name are derived from Watlow’s exclusive mineral insulation—a material with a much higher thermal conductivity than mica and hard ceramic insulators used in conventional heaters.
A thin layer of the “high” thermal conductive MI material is used to electrically insulate the element wire from the inside diameter of the heater sheath. A thicker, “low” thermal conductivity layer backs up the element wire, directing the heat inward toward the heated part. The result is more efficient heat transfer—a performance solution lowering element wire temperatures and increasing heater life.
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Mineral Insulated (MI) Band Heaters
The MI band heater from Watlow® is a high-performance heater.
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Mica Strip Heaters
Versatile, efficient and economical, the Mica Strip Heater is of the same construction as the Mica Band Heater in flat design.
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Mica Band Heaters
Mica Band Heaters are best suited for low to moderate temperatures, featuring thin construction and high quality insulation for effective heat transfer and excellent dielectric properties. They offer a wide variety of termination and clamping styles.
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Coiled Cable Heaters
Coiled cable heaters are the ultimate design in coiled type heaters. Their design and technical development gives them a longer lifespan than the competition, due to special features including:
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Ceramic Band Heaters
Ceramic band heaters are, in effect, high temperature electric furnaces capable of very efficient heat transfer by radiation, conduction and convection. Built-in insulation minimizes unwanted temperature changes along the barrel.
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375 HIGH-TEMPERATURE STRIP HEATERS
RUGGED HEATER CAPABLE OF HIGH TEMPERATURES AND HIGH WATT DENSITIES
Named for its 0.375 in. (9.5 mm) thickness, the rugged Watlow 375 strip heater is capable of both high temperatures and high watt densities.
Watlow begins construction by accurately placing a coiled, nickel-chromium element wire in the center of the heater. The element wire is then embedded in magnesium oxide (MgO)-based insulation compacted into a solid mass creating excellent heat conductivity and high dielectric strength. The heater is then enclosed in aluminized steel or 430 stainless steel sheathing.
- Nickel-chromium element wire is centered in the heater assures uniform heat
- Aluminized steel sheath operates at higher temperatures and resists corrosion
- Optional 430 stainless steel sheath meets temperature requirements that reach up to 1200°F (650°C)
- Over 100 in-stock models in popular sizes and ratings for next-day shipment
- UL® approved to 240VAC (File No. E52951) and CSA approved to 600VAC (File No. LR7392)
Material Maximum Operating TemperaturesF°C°Maximum Watt DensitiesW/in2W/cm2Aluminized Steel 1100 595 100 15.5
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