Watlow Strip Heaters
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375 Finned Strip
The 375 finned strip heater from Watlow is constructed
of highly-compacted magnesium oxide (MgO) based
insulation, which conducts heat efficiently from the nickel
chromium element wire to the sheath. Two-inch wide
(51 mm) nickel plated fins are attached to maximize
surface contact allowing heat to transfer into the air
faster. Lower sheath temperature and element life are
maximized by this finned construction.
MI Strip
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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375 Strip Performance Capabilities
•Aluminized steel sheath temperatur
es up to 1100°F (595°C)
•430 stainless steel sheath temperatur
es up to 1200°F (650°C)
•Watt densities up to 100 W/in
•UL approved up to 240VAC (File No. E52951)
•CSA approved up to 600VAC (File No. LR7392)
Features and Benefits
•Nickel-chromium element wire is centered in the heater Assures uniform heat
Aluminized steel sheath
•Operates at higher temperatures and resists corrosion
better than iron-sheathed heaters
•Minimizes heat-up time Optional 430 stainless steel sheath
• Meets temperature requirements that reach up to
1200°F (650°C)
•Post terminals, welded to the element wire
•Produces strong, trouble-free connections
Rigid 3/8″ (9.5 mm) thick design
•Enables the heater to fit into many existing applications
Over 100 in-stock models in popular sizes and ratings
•Allows next day shipment Available dimensions are 1
in. (38 mm) wide and 5.5″to 48 in. (140 to 1219 mm) long
•Fits a variety of application needs
MI Strip Performance Capabilities
•Sheath temperatures up to 1400°F (760°C)
•Watt densities up to 140 W/in (21.7 W/cm
•Maximum voltage up to 480VAC
•UL component recognition for most 240VAC or less de-
signs (UL File No. E52951)
Features and Benefits
Higher watt densities than any other strip heater
•Provides faster heat up
Exclusive mineral insulation
•Combines dielectric strength and superior thermal
conductivity
•Transfers heat rapidly to the sheath
304 stainless steel sheath
•Maintains the high compaction of mineral insulation
•Produces a rigid heater
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