EMERSON

Temperature is the most commonly measured variable in the process industry. It is
often a critical factor in determining process efficiency and product quality. There
are several ways to measure temperature in the process industry and each present
their own unique challenges. This paper will detail how a new surface sensor
innovation can address the challenges and alleviate the pain inherent to traditional
process temperature measurement practices.
A thermowell and temperature sensor assembly is the most frequently used
method of measuring a temperature internal to a process. Thermowells allow for
direct sensor immersion into a process which helps provide an accurate
measurement, but introduces many complex design challenges and risks
associated with creating a possible leak point.
A traditional surface sensor measurement can remove the challenges presented by
a thermowell by eliminating the need for a process intrusion. Unfortunately, this
method comes with its own challenges as it cannot provide an accurate or
repeatable representation of an internal process temperature due to various factors
that can impact the measurement.
A new surface sensor innovation eliminates the challenges presented by
thermowells and process intrusions while providing comparable measurement
performance. This new innovation uses a heat flux algorithm that applies known
thermal conductivity properties of both the process pipe or vessel and the surface
temperature measurement assembly to calculate an accurate and repeatable
internal process temperature value.

EMERSON (2016) Achieve Accurate Process Temperature Measurement with Surface Sensor Innovation

EMERSON (2016) Achieve Accurate Process Temperature Measurement with Surface Sensor Innovation
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