INDEX thermal sensor

Thus, compliance with limits for temperature uniformity throughout empty autoclaves (heat distribution studies) is an index of the way in which the autoclaves are engineered. Compliance with limits for temperature uniformity within items loaded into the autoclaves (heat penetration) is an index of the way in which items are wrapped for sterilization (where applicable) and how they are loaded into the autoclaves in relation to the positions of steam inlets, drains, racks, trays, and thermal sensors. 

The measurement system developed, as shown in Figure 5, is introduced into the furnace on level SCCo i so that the ceramic tip is in the gas flow. The key elements of the measurement equipment are a suction pyrometer for the temperature measurement, a wide-range oxygen sensor (BOSCH LSU4) for the fast oxygen measurement, and a thermal conductivity detector (TCD) to measure the transient response of the Helium tracer concentration. For the determination of the transient response of the TCD measurement system itself Helium tracer was injected Just at the inlet of the suction pyrometer. In Figure 7 a typical transient response of the TCD measurement system is shown (curve with index SCCi . 

This class of sensors consists of devices that can determine specific chemical composition in industrial process streams by measuring some physical properties, such as voltage, current, electrical or thermal conductivity, absorbance, density, refractive index. 

Due to the good control over the different parameters described above, these types of PCs are much studied for their applications as colorimetric, gas, thermal, or even photonic nose sensors among others. In particular, gas sensors is one of the more advanced applications based on the use of PCs [38,39]. Pores in the MTF are accessible and, consequently, the refractive index of the different layers that compose the photonic structure may increase as they are exposed to vapors. This increase of the refractive index in each slab of the unit cell redshifts the PEG position according to Eqs. (33.3) and (33.4) [40]. 

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