From RS PRO a BS copper disc fine wire Type K thermocouple temperature sensor, designed for taking rapid and reliable surface temperature measurements. This thermocouple sensor has a fast response design with a Teflon® PFA insulated cable. The thermocouple junction is grounded for a fast response time and features bare tails termination and has exposed junction thermocouple with Copper Disc brazed at tip.

A thermocouple is a sensor used to measure temperature in a range of different processes and consists of two wire legs made from different metals joined together at their two ends to form two junctions. The hot, or measuring junction is connected to the body whose temperature is going to be measured. The cold junction or reference junction is connected to a body of known temperature. When the measuring junction is placed on something hot a voltage or potential difference between this and the reference junction occurs. This voltage can then be converted into a temperature measurement using thermocouple reference tables. This process is also known as the Seebeck Effect

This thermocouple is designed for measuring the temperature on a surface. Most thermocouples have a sensing tip where there ends of the thermocouple wires are encased in sheaths or protection tubes which do not allow for measuring the temperature of a surface area. Surface temperature sensing thermocouples overcome this problem by having the sensing tip housed in a magnet or adhesive patch. The patch or magnet is then securely attached to the surface to be measured to provide a true surface contact. This affixing method allows these thermocouples to be used on many types of surfaces including uneven and circular surfaces. They are also simple to use and easy to replace and position.

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