Sarrafa mai kara kuzari
Ƙimar matakin lalacewa na mai kara kuzari, wanda aka fi sani da ƙwararrun mai canzawa, wanda tsarin bincike na kan jirgin ke yi akai-akai, ya ƙunshi duba canjin iskar oxygen a cikin iskar gas kafin da bayan mai kara kuzari.
Don wannan dalili, ana amfani da siginar da na'urori masu auna siginar oxygen (wanda aka sani da firikwensin lambda). Daya daga cikin na'urorin da aka shigar a gabansa 
mai kara kuzari da kuma baya na biyu. Bambance-bambancen sigina shine saboda gaskiyar cewa wasu iskar oxygen a cikin iskar gas suna kama da mai kara kuzari don haka abun da ke cikin iskar oxygen a cikin iskar iskar gas yana ƙasa da mai haɓakawa. Ƙarfin oxygen na mai kara kuzari ana kiransa ƙarfin oxygen. Yana raguwa yayin da mai kara kuzari ke sawa, wanda ke haifar da haɓakar adadin iskar oxygen a cikin iskar gas ɗin da ke barin ta. Tsarin bincike na kan jirgin yana kimanta ƙarfin iskar oxygen na mai kara kuzari kuma yana amfani da shi don sanin tasirinsa.
Ana amfani da firikwensin iskar oxygen da aka girka kafin mai kara kuzari don sarrafa abun da ke cikin cakuda. Idan wannan shine abin da ake kira cakuda stoichiometric, wanda ainihin adadin iska da ake buƙata don ƙona adadin man fetur a wani lokaci da aka ba shi daidai da adadin ƙididdiga na ka'idar, abin da ake kira binary bincike. Yana gaya wa tsarin sarrafawa cewa cakuda yana da wadata ko jingina (don man fetur), amma ba ta nawa ba. Ana iya yin wannan aikin na ƙarshe ta abin da ake kira broadband lambda probe. Sigar fitarwar sa, wacce ke siffata abubuwan da ke cikin iskar oxygen a cikin iskar iskar gas, ba ita ce ƙarfin lantarki da ke canzawa mataki-mataki ba (kamar yadda yake cikin bincike mai matsayi biyu), amma kusan ƙarfin halin yanzu yana ƙaruwa. Wannan yana ba da damar auna abun da ke tattare da iskar iskar gas sama da fadi da kewayon wuce haddi na iska, wanda kuma aka sani da rabon lambda, don haka kalmar broadband probe.
Binciken lambda, wanda aka girka a bayan mai canzawa, yana yin wani aiki. Sakamakon tsufa na firikwensin iskar oxygen dake gaban mai kara kuzari, cakuda da aka tsara akan siginar sa (daidaitacce) ya zama mai rauni. Wannan shine sakamakon canza halayen binciken. Ayyukan na'urar firikwensin oxygen na biyu shine sarrafa matsakaicin abun da ke ciki na cakuda da aka ƙone. Idan, bisa ga siginar sa, mai kula da injin ya gano cewa cakuda ya yi rauni sosai, zai ƙara lokacin allura daidai don samun abun da ke ciki daidai da bukatun shirin sarrafawa.
