Nexthermal Flat Coil Heater

Nexthermal’s flat coil heaters set the standard with respect to precise fit and profiling to optimize the performance of nozzles and other mating components. Available with or without internal thermocouples -Type J or Type K. At 2.5mm (0.098 in.) in height, the Nexthermal flat coil heater can accommodate today’s design objective of placing nozzles closer to waterlines and minimizing material usage. With a superior width of  3.4mm (0.134 in.) surface contact is maximized resulting in less required heated length and more watts per linear inch.

Nexthermal offers a wide range of performance enhancing options including:

  • Outside sheath to improve heating efficiency
  • Inside/Outside sheath with sealed end rings to prevent contaminates shortening heater life
  • Embedding in brass to create high thermal mass surrounding the heater improving high temperature performance, and heater life
  • Moisture resistant transition head
  • High temperature lead and potting options
  • Flexible cold section
  • Wide variety of standard and custom lead exit options

Nexthermal can wind coil heaters from stock and ship same day or build to order in 7 business days.

Nexthermal Advantage

  • Custom wound from straight stock for same day shipments
  • Flexible cold section
  • Higher watt density than a cable heater
  • Resistance wire centered for more repeatable heat profile
  • Sealed transition head for moisture resistant applications available
  • Build to order ships in 7 business days

Technical Data

  • Thermocouple: Integrated type J or type K
  • Profile: 2.5mm (0.098 in.) Thick  X 3.4mm (0.134 in.) Wide
  • Maximum Sheath Temperature: 1382° F
  • Sheath Material: Cr-Ni Steel
  • Maximum Total Straight Length: 3000mm (118.11 in.)
  • Length Tolerance: Heated +/-1%; Unheated +/- 2.5%
  • Maximum Voltage: 250VAC
  • High Voltage Stability: 800 VAC
  • Wattage Tolerance: +/-10% (contact hotset for special)
  • Minimum Bending Radius: 6.35mm (0.250 in.)
  • Watt Density: 38.7 Watts/In2
  • Insulation Resistance: >= 5M Ohm @ 500 VDC (cold)
  • Leakage Current: <= 0.1mA @ 253 VAC (cold)
  • Length of Unheated Zone: 65mm (2.56 in.); 25mm (1.00 in.) Transition Head
  • Standard Connection from Stock: 48 in. Teflon Leads.


  • Plastic injection molding
  • Under water pellitization
  • Semiconductor manufacturing and wafer processing
  • Hot metal forming dies and punches
  • Sealing and cutting bars
  • Restaurant and food processing equipment
  • Laminating and printing presses
  • Air heating
  • Heating in a vacuum environment
  • Textile Manufacturing