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Thermocouple Wire and Thermocouple Extension Wire

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High Temperature Vitreous Silica Braided Thermocouple Wire SERIES 301 and 365

High Temperature Vitreous Silica Braided Thermocouple Wire SERIES 301 and 365

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Both the SERIES 301 and 365 use vitreous silica yarn as the insulation on both the conductors and duplex. This yarn retains its flexibility after exposure to high temperatures.
The vitreous silica yarn’s greater purity performs better at high temperatures than other fibrous glass products. Testing has indicated that “contamination” will compromise this material’s upper use temperature. For this reason, our standard offering is supplied without color coding or impregnations. The 365 construction is a cost-effective, medium insulation build of the popular heavy duty 301 construction.


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Fiberglass Braided Thermocouple and Extension Wire SERIES 304

Fiberglass Braided Thermocouple and Extension Wire SERIES 304

The uniform quality and availability of the SERIES 304 make it the ideal wire for general applications requiring moderate abrasion and moisture resistance, wide temperature capabilities and economy.

Each conductor is covered with a color coded glass braid. This braid is impregnated to enhance abrasion resistance and reduce fraying. The insulated single conductors are laid parallel and covered with another layer of woven glass. A final impregnation is then applied to the glass.

Fiberglass Wrapped Thermocouple and Extension Wire SERIES 305

Fiberglass Wrapped Thermocouple and Extension Wire SERIES 305

SERIES 305 is specifically constructed for light duty applications where size is a critical factor. The single conductors are insulated using a specialized yarn wrapped on the conductors in layers. This yarn is then impregnated to add abrasion resistance and enhance electrical properties. The insulated single conductors are then laid parallel and covered with a layer of braided glass. A final impregnation is applied to the braid.

High Temperature Fiberglass Twisted Thermocouple Wire SERIES 314

High Temperature Fiberglass Twisted Thermocouple Wire SERIES 314

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The SERIES 314 is an economical construction for general, high temperature applications. The braided high temperature yarn is applied in a unique manner that allows SERIES 314 to be competitively priced with other fiberglass constructions. It produces a finished wire that performs at temperatures to 870°C (1600°F).
The conductors are insulated with braided high strength fiberglass and impregnated to improve abrasion resistance. The impregnation is tinted to impart color coding to primary insulations. The insulated single conductors are then twisted together to yield a construction flexible enough for most any application.


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High Temperature Braided Fiberglass Thermocouple Wire SERIES 321

High Temperature Braided Fiberglass Thermocouple Wire SERIES 321

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The addition of color coding and impregnation to the high temperature fiberglass make this the logical next step for systems which have exceeded the temperature capabilities of standard glass insulated series.

Each conductor is covered with a color coded, high temperature fiberglass braid. This braid is then impregnated to enhance abrasion resistance and reduce fraying. The insulated conductors are laid parallel and covered with another braid of high temperature fiberglass and impregnation.

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High Temperature Ceramic Fiber Thermocouple Wire SERIES 350 and 355

High Temperature Ceramic Fiber Thermocouple Wire SERIES 350 and 355

The SERIES 350 uses the ultimate high-temperature flexible insulating system. The ceramic fiber yarn’s upper temperature limit often exceeds the melting point of the material it’s insulating. When an application requires flexible insulation, while pushing Type K or Type N to their extreme limits, ceramic fiber insulation is the only choice.
Watlow supplies standard SERIES 350 without color coding or impregnations. This minimizes contaminating the pure ceramic fiber yarn. Laboratory testing indicates the impregnation can decrease the upper use temperature by as much as 540°C (1000°F).


PVC Insulated Extension Wire SERIES 502

PVC Insulated Extension Wire SERIES 502

SERIES 502 is an economical wire that’s also available in ULreg; listings for PLTC (Power Limited Tray Cable) applications.
The primary and duplex insulation is PVC. It yields a construction that’s inexpensive while performing continuously at temperatures to 105°C (220°F).
SERIES 502 is often used in conduit and wiring trays where its flexibility allows for easy installation. The SERIES 502 can be easily stripped using hand tools or mechanical methods.
The SERIES 502 is also available as a UL® PLTC construction.


PVC Insulated Extension Wire SERIES 502 UL

PVC Insulated Extension Wire SERIES 502 UL®

UL® SERIES 502 is an economical wire available in UL® listings for Power Limited Tray Cable (PLTC) applications.
The primary and duplex insulation is PVC. It yields a construction that’s in-expensive while performing continuously at temperatures to 105°C (220°F).
UL® SERIES 502 is often used in conduit and wiring trays where its flexibility allows for easy installation. The UL® SERIES 502 can be easily stripped using hand tools or mechanical methods.


PVC Insulated “RIPCORD” SERIES 505

PVC Insulated “RIPCORD” SERIES 505

The SERIES 505 is the most economical wire produced. Unlike some competitive “ripcord” type constructions which use only a stripe to establish polarity, SERIES 505 single conductors are fully color coded. The conductors are individually insulated with the proper colored PVC and fused into “ripcord” using a proprietary process.
The insulated conductors can be easily separated by hand once the bond between conductors has been slit. As with other PVC insulated products, SERIES 505 lends itself well to both manual and mechanical stripping methods.


Small Gauge FEP Insulated SERIES 506

Small Gauge FEP Insulated SERIES 506

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The SERIES 506 is the smallest standard insulated wire construction. The thin FEP wall on both primary and duplex insulation yields a construction that can operate safely at temperatures far beyond common PVC and nylon insulations.

The SERIES 506 is fully color coded for ease of installation. Its small size allows use in high density circuits. Response time is minimized by small diameter conductors. SERIES 506 is available only in gauge sizes of #26 and smaller. For gauge sizes larger than #26 specify SERIES 507

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FEP Insulated Thermocouple and Extension Wire SERIES 507

FEP Insulated Thermocouple and Extension Wire SERIES 507

The SERIES 507 is the most economical fluoroplastic insulated wire. SERIES 507 is also available as UL® listed PLTC. Individual conductors are coated with a layer of color coded FEP. The insulated conductors are then parallel duplexed with an additional layer of color coded FEP. The finished construction has a temperature rating of 260°C (500°F). Abrasion, moisture and chemical resistance are far in excess of most other insulations.

TFE Insulated SERIES 508

TFE Insulated SERIES 508

The primary and duplex insulation of SERIES 508 is fused TFE tape. The tape is spirally applied to the conductor and heated. This process, called sintering, forms the tape into a homogeneous layer. When sintered, the tape exhibits all of the advent- ages of extruded TFE insulation, while eliminating the concentricity problems associated with TFE extrusions.

FEP Insulated and Shielded Thermocouple and Extension Wire SERIES 509

FEP Insulated and Shielded Thermocouple and Extension Wire SERIES 509

The SERIES 509 was developed especially for use with microprocessor based systems. SERIES 509 is also available as UL® listed PLTC .
The conductors are insulated with color coded FEP. They are then twisted with a copper drain wire. An aluminized polyester tape is wrapped around the conductors and drain wire. Finally, FEP is applied.


PVC Insulated and Shielded Thermocouple and Extension Wire SERIES 510

PVC Insulated and Shielded Thermocouple and Extension Wire SERIES 510

The SERIES 510 is a PVC insulated, twisted and shielded construction for systems sensitive to induced voltages and “noise.” SERIES 510 (see page 202) is also available as UL® listed PLTC.
The conductors are insulated with color coded PVC. The next operation twists the two insulated conductors with a copper drain wire. An aluminized polyester tape is wrapped around the wires to impart 100 percent shielding. Lastly, another layer of PVC is applied.


Polyimide Insulated and Twisted SERIES 511

Polyimide Insulated and Twisted SERIES 511

SERIES 511 is the most economical polyimide taped construction. The polyimide film applied to the conductors is considered to be the ultimate “soft” insulation. The tape maintains its strength at temperatures to 315°C (600°F). The FEP laminate serves as a moisture barrier and allows the tape to fused with itself. The finished construction will not unravel when cut.
The SERIES 511 conductors are wrapped with the polyimide tape which is fused to itself. Each conductor is color coded with a colored thread under the tape. The final operation is twisting the insulated conductors into a duplex construction, thereby eliminating the overall duplex insulation and minimizing cost.


Polyimide Insulated SERIES 512

Polyimide Insulated SERIES 512

The SERIES 512 is a heavier duty version of SERIES 511 construction, using the same polyimide insulation. Color coding is accomplished using the same colored thread “tracers.” However, the SERIES 512 has a duplex insulation of polyimide tape. The extra wall of tape yields a construction with increased abrasion resistance.

Double Polyimide Insulated SERIES 513

Double Polyimide Insulated SERIES 513

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The SERIES 513 is the ultimate polyimide insulated wire. The multiple polyimide tape layers along with fully color coded conductors make this insulation system the choice for high reliability circuits. Abrasion, moisture and chemical resistance are all enhanced by additional layers of tape and application of polyimide varnish.

The actual construction consists of a double polyimide tape layer applied to each conductor. The tape is fused by heating. Each insulated single conductor is then coated to impart the proper color code. Finally, the insulated conductors are laid parallel and covered by a double, heat fused layer of polyimide tape.

PFA Insulated Thermocouple and Extension Wire SERIES 516

PFA Insulated Thermocouple and Extension Wire SERIES 516

A relatively new fluoroplastic, PFA, is the insulation on SERIES 516. PFA’s temperature rating is only slightly less than TFE. However, PFA can be applied using conventional extrusion techniques. This produces a smooth finish, as opposed to the spiral usually associated with TFE tape constructions. This is important in the food industry where taped constructions present cleaning problems. The smooth surface also allows this construction to be pulled through conduits and cut-outs more easily.