Mineral Insulated Thermocouples

Manufactured with best-in-class XACTPAK®, Watlow's trademark for metal sheathed, mineral insulated (MI) thermocouple material, XACTPAK responds fast because the protective metal outer sheath allows use of smaller diameter thermocouple conductors. The rock hard compacted MgO insulation further enhances the sensor's ability to “read” temperature by transferring heat quickly to the measuring junction.

Tube and Wire Thermocouples

Watlow is a world class supplier of temperature measurement products, with more than 90 years of manufacturing, research and design expertise. Companies engaged in critical process control of food and metals rely on Watlow thermocouples. Watlow designs and manufactures sensors to meet customers' industrial and commercial equipment needs. Watlow has developed an extensive line of thermocouples to meet a broad range of sensing needs.

Our extensive line of thermocouples feature flexible SERV-RITE® wire insulated with woven fiberglass or high temperature engineered resins. For added protection against abrasion, products can be provided with stainless steel wire braid and flexible armor. ASTM E230 color-coding identifies standard catalog thermocouple types.

The addition of a metal sheath over the thermocouple provides rigidity for accurate placement and added protection of the sensing junction. Mounting options include springs, ring terminals, specialized bolts, pipe style clamps and shims.

EXACTSENSE® Thermocouples

The EXACTSENSE thermocouple from Watlow provides the accuracy, response time and durability required to help manufacturers improve their diesel aftertreatment system performance. This sensor is designed to meet demanding global emission requirements for over-the-road medium and heavy-duty vehicles and off-road construction, mining, agriculture, marine and locomotive equipment. It is available with a variety of standard options to meet specific manufacturer requirements.

MICROCOIL™ Thermocouples

Watlow's MICROCOIL miniature thermocouple provides surface temperature measurements that deliver an unparalleled degree of accuracy. This patented technology achieves critical isothermal surface temperature measurement and offers superior design flexibility.

Multipoint Thermocouples

Multipoint temperature sensors accurately measure temperatures at various locations along the sensor's length. They are used across a broad range of processes and installations—predominately in applications involving a large or complex process where close temperature control is necessary.Temperature variances exist in all systems, regardless of materials, working fluid or system design. There is not a process that involves heating a particular medium where temperature of that medium is consistent throughout—temperature gradients always exist. Sensing temperature at a single location during a process is acceptable for many applications because temperature gradients are often insignificant. However, there is a need for many applications to monitor temperature in multiple locations to ensure a safe, accurate and cost efficient process. Installing multiple, independent temperature sensors may be impractical due to cost or space limitations.

Radio Frequency Thermocouple

Watlow’s TR thermocouple probe is designed for use in plasma generation applications to ensure accurate temperature readings through radio or conduction environments where traditional sensors are ineffective. Radio frequency energy can cause serious temperature measurement errors when exposed to these types of environments.

True Surface Thermocouple (TST)

Watlow's true surface thermocouple (TST) offers superior accuracy for measuring flat surface temperatures. This compact, highly accurate sensor isolates the thermocouple junction from ambient airflow. The TST typically achieves accuracy and repeatability between one to two percent (ΔT). The TST, with its removable molded cover, fits into corners and other tight locations. TSTs are easy to install with a variety of commonly used screw types.

Thermocouple Temperature versus EMF Tables

The table in the link above provides Temperature vs. EMF outputs of common thermocouples in accordance with ITS-90 reference standards.