Influence on measurement results due to temperature fluctuations
Measurement results provided by high precision measurement systems are influenced to varying degrees by different environmental influences. One of these environmental influences is temperature. Thermal expansion caused by changes in temperature also affects the geometric shape of the sensor itself and on the measurement object. As well as electrical parameters such as resistors and optics, other parameters such as the refraction index can be influenced by changes in temperature.
Micro-Epsilon is a specialist in the field of high precision distance measurement and uses active temperature compensation in order to increase the temperature stability with eddy current systems. The ambient temperature no longer influences the precision of the measurement results and the sensors provide precise measurement results regardless of the thermal conditions in their permissible operating temperature range.
The technical specifications from different manufacturers often do not show if their systems are temperature compensated. They only provide indications of temperature ranges for operation and/or storage. It is therefore important to consider temperature compensation and, if necessary, to ask the sensor supplier for details, as temperature is a key factor for successful measurements.
Especially the eddyNCDT eddy current sensors (-40°C to more than 200°C) and the capaNCDT capacitive sensors (-270°C to + 200°C) from Micro-Epsilon are robust against temperature fluctuations and operate with high precision even under extreme conditions. The innovative design and active temperature compensation provide these sensors with an extremely high temperature rating and long-term stability, as well as excellent repeatability.