T_eff vs. log(y) diagram using the classification scheme from Németh et al. (2012) to discern the helium (He) abundance in pulsating sdB stars. The parameter space for sdBs is divided into He-rich (shaded light blue region) and He-deficient (shaded green area) stars. These divisions are subsequently categorized into He-poor (pHe), He-weak (wHe), and intermediate He-rich (iHe) classes. The color-codes for the targets are the same as in Fig. 4.