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ASTM Type J or K internal thermo-couples are available on lead Type B with loose braid. The thermocouple junction, which is welded inside the leadcap or spot-welded to heatersheath, provides a signal for measur- ing relative heater temperature.

W A T L O W

Plastics catalog - 7347 Barrel Heaters

MI Band

Variations

Lead Wire Heaters rated at less than250V Å (ac) use this wire.When ordering, specify Å (ac) use UL
® approved leadinsulation for operations to 250°C(480°F) as standard. Lead insulationUL 450ËšC(850°F) wire. Thermocouple
® rated for operation to 450°C (840°F) is available for high temperature applications where the leads are shrouded or enclosed with the heater. These leads are available in any of the Type B with loose braid as well as Types E, F and H leadconfigurations. All heaters rated at more than 250V expandable. On 25 mm (1 in.) wide MI Bandheaters, post terminals will be located 90 degrees from the expansion joint. Leads may be located anywhere along the circumference except near the gapand at the expansion joint. Two setsof leads are required. To order, specify
Injection Molding Barrel Heaters Spot welded toheater sheath Expandable Heaters With and Without Leads MI Band heaters 38mm (1.5 in.) wide or greater will have postterminals located next to the expansion joint. Leads may be located anywhere along thecircumference except near the gap and at the expansion joint. Two sets of leads are required. Expandable heaters are two-pieceunits with a common top metal that allows the heater to expand open to the full diameter of the barrel. On expandable bands, each half will be one half of the total wattage. Plus,on both expandable and two-piecebands, each half will be rated at full operating voltage, unless otherwise specified.
38 mm (1.5in.) wideand greater Type SLE and length. Type SLE
11 mm(0.4375 in.) Strain Relief Two fiberglass lead wires exit asingle tightly woven metal braid at right angle on the expandable construction verses two sets of leads. Minimum diametercapabilities is 100 mm (4 in.).Minimum width capabilities is 38 mm (1.5 in.). To order, specify
UL ® is a registered trademark ofUnderwriter's Laboratories, Inc. 23