When selecting a thermocouple, it’s important to consider several factors to ensure it functions effectively for your application. One key aspect is the tip configuration, which is the sensing point that measures temperature. There are various tip configurations available, and each is suitable for different applications.
The standard tip configurations are as follows: bare wire, grounded, grounded (reduced), ungrounded and ungrounded (reduced). Additionally, there are speciality tips designed for specific applications.
For maximum sensitivity and fastest response, bare wire is the best option. This option provides no mechanical protection and is advised from being used in environments where it will get chemically attacked, in high-pressure environments, and if it comes in contact with fluids. They’re best for clean, dry, static gases and air applications.
- Bare Wire: This option offers maximum sensitivity and the fastest response time. However, it provides no mechanical protection and should be avoided in environments where it may be exposed to chemicals, high pressure or fluids. Bare wire thermocouples are ideal for clean, dry, static gases and air applications.
- Grounded Tip: One of the most common configurations, the grounded tip is not recommended for high temperature or highly corrosive environments. It is typically used in applications requiring both rapid thermal response and robust mechanical protection.
- Grounded Reduced Tip: This configuration shares the same specifications as the grounded tip but features a reduced outer diameter for faster response times without compromising structural strength.
- Ungrounded Tip: This option is designed for greater durability under high vibration and shock, and corrosive conditions. It is recommended for electrical applications where stray RFI/EMI might impact output, as it is completely electrically isolated.
- Underground Reduced Tip: Similar to the ungrounded tip, this version has a reduced outer diameter for quicker response times whole maintaing structural integrity. It accommodates larger termination conductors, enhancing resistance to corrosion and breakage, as well as improving insulation resistance between sheath-to-wire and wire-to-wire.
By understanding these configurations, you can make a more informed choice that suits your specific thermocouple application. If you’re unsure of which tip is the best option for your application, contact us today, and we will be happy to help.
