Ua haujlwm cov ntsiab cai ntawm bimetal pas nrig thiab hlau raj sensor
Raws li qhov kub nce, qhov ntev ntawm cov hlau raj (cov khoom A) nce, tab sis qhov ntev ntawm cov hlau tsis txuas ntxiv (hlau B) tsis nce, yog li vim qhov hloov pauv chaw, txoj kab tawm ntawm cov hlau hlab tuaj yeem kis tau. Nyeg, qhov kev tawm ncaj qha no tuaj yeem hloov mus rau lub teeb liab tawm ua haujlwm.