Du-Co Ceramics manufactures precision round thermocouple tubes designed to provide dependable electrical insulation and protection for thermocouple wires and temperature sensing assemblies in high-temperature environments. These ceramic tubes help protect thermocouple elements from mechanical damage and harsh operating conditions while maintaining accurate temperature measurement. Round ceramic thermocouple tubes are commonly used in industrial furnaces, kilns, heat treating equipment, and other high-temperature process applications where reliable sensor protection is essential. Du-Co offers standard and custom lengths to meet specific application requirements.
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| Part No. | OD | 2 Hole | Material |
|---|---|---|---|
| R-70 | 0.066 | 0.016 | Steatite |
| R-26 | 0.085 | 0.022 | Steatite |
| R-33 | 0.094 | 0.025 | Steatite |
| R-58 | 0.094 | 0.025 | Steatite |
| R-25 | 0.109 | 0.035 | Steatite |
| R-74 | 0.116 | 0.030 | Steatite |
| R-27 | 0.125 | 0.039 | Steatite |
| R-86 | 0.125 | 0.035 | Steatite |
| R-45 | 0.147 | 0.040 | Steatite |
| R-23 | 0.148 | 0.045 | Steatite |
| R-31 | 0.150 | 0.039 | Steatite |
| R-61 | 0.156 | 0.046 | Steatite |
| R-56 | 0.175 | 0.046 | Steatite |
| R-85 | 0.181 | 0.063 | Steatite |
| R-30 | 0.187 | 0.040 | Steatite |
| R-21 | 0.187 | 0.062 | Steatite |
| R-79 | 0.207 | 0.075 | Steatite |
| R-88 | 0.210 | 0.040 | Cordierite |
| R-83 | 0.218 | 0.052 | Steatite |
| R-20 | 0.218 | 0.080 | Steatite |
| Part No. | OD | 2 Hole | Material |
| R-68 | 0.235 | 0.075 | Steatite |
| R-78 | 0.236 | 0.039 | Steatite |
| R-63 | 0.245 | 0.073 | Steatite |
| R-16 | 0.250 | 0.085 | Steatite |
| R-80 | 0.275 | 0.078 | Steatite |
| R-75 | 0.275 | 0.090 | Steatite |
| R-14 | 0.281 | 0.085 | Steatite |
| R-76 | 0.282 | 0.093 | Cordierite |
| R-87 | 0.290 | 0.070 | Steatite |
| R-38 | 0.302 | 0.075 | Steatite |
| R-43 | 0.312 | 0.078 | Steatite |
| R-15 | 0.312 | 0.093 | Steatite |
| R-13 | 0.375 | 0.109 | Cordierite |
| R-66 | 0.375 | 0.125 | Cordierite |
| R-34 | 0.435 | 0.156 | Cordierite |
| R-60 | 0.468 | 0.109 | Cordierite |
| R-9 | 0.474 | 0.166 | Cordierite |
| R-54 | 0.488 | 0.159 | Cordierite |
| R-59 | 0.500 | 0.159 | Cordierite |
| R-5 | 0.503 | 0.187 | Cordierite |
| Part No. | OD | 2 Hole | Material |
| R-3 | 0.562 | 0.187 | Cordierite |
| R-1 | 0.562 | 0.171 | Cordierite |
| R-2 | 0.687 | 0.217 | Cordierite |
This information is for design guidance only. Du-Co Ceramics Company will not guarantee this information as absolute values. Various geometries can affect properties.
Standard lengths are 1″, 2″ & 3″ long, however the length can be made to best fit your application. Please call for additional information.
Need a Ceramic Thermocouple Tube for Your Application?
Du-Co Ceramics manufactures precision round thermocouple tubes and ceramic protection tubes for demanding temperature sensing applications. Whether you require standard sizes or a custom configuration, our team can help identify the right ceramic solution for your application. Contact us today to discuss your requirements or request a quote.