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Thermowell Installation

By Chemical Engineering |

Temperature is among the most critical measurements in the chemical process industries (CPI) for operating safe and efficient processes. Because even a small error in temperature can lead to expensive consequences, accurate and reliable monitoring of temperature is required. Thermowells The most accurate temperature measurements occur when the sensor is in direct contact with the process fluid being measured. Since fluids in the CPI can often be corrosive or erosive, and can destroy a bare sensor quickly, the most common way of making temperature measurements is to use a thermowell. A thermowell is a hollow tube, often tapered, that projects into the process fluid to protect an immersed sensor. Because it is immersed in the fluid, the thermowell reaches the same temperature as the fluid. Once a thermowell is installed, an immersion probe containing a temperature sensor is inserted into the thermowell from the outside so that the sensor fits flush against the end of the thermowell. Because the thermowell is immersed in the process fluid, it transfers the temperature of the fluid to the sensor. Thermowells can also be mounted onto the side of a tank. Installing thermowells The following are some general guidelines and tips for installing…
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