External Thermocouple

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 Heaters with Thermocouple at Hot Tip
Watt-Flex® Cartridge Heater with Thermocouple at Hot Tip

 

Watt-Flex Cartridge Heaters with Thermocouple Inserted
Side Groove with Thermocouple Inserted

 

Side Grooved Cartridge Heater
Side Groove Profile

Center Groove Heater - Cross section Center Groove Cartridge Heater Cross-section view

 

Center Groove Cartridge Heater with Thermocouple inserted Center Groove Cartridge Heater
with Thermocouple Inserted

 

TC-Side Groove TC-Side Groove