Watt-Flex split-sheath cartridge heaters can be manufactured with a groove along the exterior of the cartridge to accommodate a needle-type thermocouple for more accurate temperature sensing and control.

Watt-Flex external thermocouples outperform internal monitors used in conventional heaters. With Watt-Flex heaters, you can:

Measure temperature at the precise point of heat transfer.

Unlike conventional heaters with internal thermocouples that measure internal heater coil temperature, Watt-Flex external thermocouples measure more precisely at the point where heat transfers from the heater to the host metal.

Monitor temperature at any point along the heater.

Dalton Watt-Flex heaters give you the flexibility to monitor heat at any point along the heater, instead of at pre-defined fixed points with internal monitors in conventional heaters.

Replace heater or thermocouple independently.

With Watt-Flex external thermocouples, you can replace either the heater or the thermocouple independently, without having to replace the entire heater/thermocouple as with conventional heater designs.

Thermocouple Specifications

Maximum lengths:

15″ maximum for grooved heaters with 1/4″ or 3/8″ diameter heaters. 7″ maximum for grooved heaters with 1/2″ diameter heaters.

Longer heaters using 1/2″ diameter or larger heaters, can be center- grooved between the legs to any depth between 6″ to 15″.

Thermocouples:

Type J with 48″ leads (standard) or to specification.
Type K with 48″ leads (standard) or to specification.

Needle diameters:

0.040″ for 1/4″ diameter heaters and all center grooves.
0.062″ for side-grooved 3/8″ and 1/2″ diameter heaters.

Watt-Flex® with Thermocouples

Watt-Flex® Cartridge Heater with Thermocouple at Hot Tip		Side Groove with Thermocouple Inserted		Side Groove Profile
Center Groove Cartridge Heater Cross-section view		Center Groove Cartridge Heater with Thermocouple Inserted		TC-Side Groove