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Southern Manufacturing & Electronics

Farnborough, Hants(GU14 6XL)

11/02/2020 - 13/02/2020

Southern Manufacturing and Electronics is the most comprehensive annual industrial exhibition in the (more)

Selecting the right temperature sensor

Selecting the right temperature sensor There's no simple solution to achieving accurate temperature measurement. It's a combination of knowing the inherent accuracy of particular sensor types, but also how environmental factors can create further measurement uncertainty and the sensor calibration techniques available to reduce this uncertainty. A basic awareness of the inherent accuracy of particular sensor types is important, but goes only a short way toward the goal of achieving optimally accurate temperature measurement. It is the broader knowledge of how sensor choice, sensor placement and a wide variety of environmental factors can contribute to sensor error, as well as having a familiarity with calibration techniques that can be used to reduce this uncertainty, that ultimately leads to optimum sensor selection and measurement accuracy. It is nearly impossible to sense temperature exactly where you need it. At the very least, the sensor itself has a finite size that displaces the sensing element from its attachment, resulting in the sensor being at a different location than the desired measurement location. If surrounding heat sources and sinks are known, location errors can be compensated for. However, this can be difficult in many systems and will result in location errors resisting calibration. The simplest solution, which avoids complex calibration techniques, is to utilise a small sensor and place it as close to the temperature source as possible.
 

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