SERV-RITE® Wire

United States and International Color Coding Standard ASTM E 230 color coding (United States) is used on all insulated thermocouple wire and extension wire when insulation type permits. In color coding, the right is reserved to include a tracer to identify the ASTM E 230 type. Thermocouple grade wire normally has a brown overall jacket. For Types R and S, the color codes correlate to the compensating cable normally used. Various national and international standard agencies have adopted color codes for identifiying thermocouples which generally differ from those specified in ASTM E 230. The overall...

Thermocouple Wire Manufactured to Exact Specifications Since 1914, SERV-RITE® thermocouple wire and thermocouple extension wire have been recognized for premium performance and reliability. All stock and custom wire is manufactured in Watlow’s plant where materials, manufacturing equipment and quality controls are carefully selected to ensure superior uniformity. Watlow offers popular wires as well as custom manufactured wire using alloys and insulation types to meet specific application demands. All SERV-RITE thermocouple wire and thermocouple extension wire is manufactured under rigid quality controls...

Thermocouple WireStock Wire Products by Temperature Thermocouple Wire Max. Opr. Temp. °F °C Note: The recommended operating temperature is limited to the extension grade alloy recommended temperature of 400°F (204°C).

Thermocouple WireStock Wire Products by Temperature (Continued) Thermocouple Wire Max. Opr. Temp. °F °C *Note: The recommended operating temperature is limited to the extension grade alloy recommended temperature of 400°F (204°C).

Thermocouple WireStock Wire Products by Temperature (Continued) Thermocouple Wire Max. Opr. Temp. °F °C *Note: The recommended operating temperature is limited to the extension grade alloy recommended temperature of 400°F (204°C).

Thermocouple Wire Max. Opr. Temp. °F °C Dbl. = Double Cot. = Cotton C.Fbr = Ceramic fiber Sil. = Vitreous silica Pr. = Pair Std. = Standard Spc. = Special Legend Brd. = Braided Gls. = Fiberglass TWS. = Twisted and shielded HT = High temperature Tp. = Taped P-mide = Polyimide Cbl. = Cable TW. = Twisted Wrp. = Wrapped

Thermocouple Wire Ordering Information How to Order Include the following information when ordering SERV-RITE thermocouple and extension wire: Calibration • E, J, K, N, SorT Gauge size • AWG gauge Solid or stranded conductors • Stranded conductors are seven strand constructions. If other configurations are required, please contact the factory. Thermocouple or extension grade • Determine if it will be used for the actual sensor or only to “extend” the signal at lower temperatures. Standard or special limits of error • This will determine the accuracy of the sensor. Limits of error are determined...

Thermocouple Wire Technical Data How to Select Wire to Meet Requirements The following information will explain some of the nomenclature associated with thermocouple wire and thermocouple extension wire. By reading this information, orders can be placed quickly and accurately. Thermocouple Wire or Thermocouple Extension Wire There are some significant differences between wire used to actually measure temperature and wire used to carry a millivoltage signal to an instrument. The most obvious difference is the color-code used to identify the wire itself. In most instances, thermocouple grade wire...

Thermocouple Wire Technical Data (Continued) Metallic Overbraids and Wraps Although standard SERV-RITE wire products are designed to yield a high degree of abrasion resistance, it is sometimes necessary to add an additional metallic covering to further enhance this property. Following are available overbraids and wraps. Stainless Steel Wire Braid (S) This most popular over-braid uses 300 series stainless steel and is available on virtually all standard SERV-RITE wire offerings. It is an economical method to extend the life of thermocouple and extension wire. Several of Watlow’s standard wire...

Thermocouple Wire High-Temperature Vitreous Silica Braided Thermocouple Wire SERIES 301 and 365 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. Because this insulation has no binders or impregnations, it may “flower” when stripped. The vitreous silica yarn’s greater purity performs better at high temperatures than other fibrous glass products. Testing indicates that “contamination” will compromise this material’s upper use temperature. For this reason, our standard...

Applications • Heat treating • Oven • General use Specifications Continuous use temperature • 900°F (482°C) Single use temperature • 1000°F (540°C) Resin retained to 400°F (204°C) Resistance properties • Moisture: Good • Chemical: Good • Abrasion: Fair Thermocouple Wire 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...

Note: Minimum order sizes apply for non-stock constructions.

Thermocouple Wire Fiberglass Wrapped Thermocouple and Extension Wire SERIES 305 SERIES 305 is specifically constructed for light duty applications where size is a critical factor. Single conductors are insulated using a specialized yarn wrapped around the conductors in layers. 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. For higher temperature applications, use SERIES 321. Performance Capabilities • Continuous...