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By William Smothers

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I) From a physical viewpoint, it is important to note that the ideal sensor voltage of Eq. A. 1 is not a mixed potential but consists only of O2cells, previously shown in Fig. 3. Ideal Behavior at Rich NF‘s The above simplifications which apply for lean NF’s also apply for rich AIF’s when ideal behavior is approached, with the exception that p C 0 ’ no longer approaches a minute value. 3 For the above limits, the f c o term of Eq. 4 in the text approaches unity, and Eq. 2) From a physical viewpoint, note that the ideal sensor voltage of Eq.

Moreover, the derivation can also follow the reverse route, where Eqs. A. 5 could be combined to show that the O2cell voltage of Eq. A. 1 reduces identically to the CO cell voltage of Eq. 2. ^ Physically, however, it is stressed that, as A/F changes from lean to rich values, the oxygen sensor exhibits what can best be described as an extreme limiting case of a mixed potential. At lean A/F’s, the ideal sensor operates purely as an oxygen concentration cell, previously shown in Fig. 3; whereas at rich A/F’s, it abruptly switches function and operates purely as a carbon monoxide cell, previously shown in Fig.

While magnets made from samarium cobalt are generally more expensive, they are often the most cost-effective solution to a particular sensor actuating design because not only will the magnetic circuit be of minimum size but other components associated with it can also be made smaller. The design considerations for choosing an appropriate permanent magnet actuator for Wiegand effect sensors are cost-effectiveness and suitability for environmental conditions. Femtes The ferrite magnets, because of their low cost and relatively larger volume, would typically be used in sensing applications requiring relatively few pulses per revolution and where temperature conditions are not too severe.

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