Fixed infrared temperature sensor
300 - 2200 °C | SH-2C
CEIA-Power
The energy radiated from an object is proportional to the temperature according to a mathematical relation that takes into consideration parameters such as the absolute temperature and the emissivity of the object heated.
The intensity of the radiation emitted is measured by optical sensors upon which a part of the radiation is focused by special lenses or waveguides.
The advantages of this technique are the absence of contact, which is necessary for measurement by thermocouple, the absence of any upper limit to the temperature measured, which for thermocouples is the melting temperature of the junction, and the response speed, which is hundreds of times higher than that of contact thermometry.
Furthermore, optical thermometers are less susceptible to influence from the environmental thermic conditions because they are focused on the object being measured.
The dual-wavelength thermometer SH2C bases its reading on the relationship between the luminous intensities emitted by the object being measured at two different wavelengths.
If the emissivity of the object is identical at both wavelengths, as in practice occurs with adjacent wavelengths, the effect cancels itself out.
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