The adverse negative impact of PM2.5 exposure has encouraged the development of scattering-based PM sensors for monitoring the PM level spatially and temporally. The PM sensors excel in cost, operating power, and compactness but their performances need to be evaluated individually. The evaluation of PM sensors can be conducted inside an aerosol chamber by measuring the PM concentration in time series using the PM sensors and reference monitors. However, the experiment processes were time-consuming, as it needed a long time to decrease the PM concentration by loss mechanisms. We designed an aerosol chamber with the introduction of an output airflow rate to decay the PM concentration faster. The characterization of the chamber yielded an empirical equation to describe the PM concentration decay profile, which can be used to predict the measurement time and the number of data points. The chamber was then utilized to evaluate three PM sensors (Sharp GP2Y1010AU0F, Winsen ZH03A, and Novafitness SDS011). A condensation particle counter (TSI, 3025A) and particle sensor (Honeywell, HPMA115S0-XXX) were employed as reference monitors. The evaluation determined linearity, calibration curve, and precision of the PM sensors. The evaluated PM sensors showed excellent linearity with R2 above 0.956. Least square and RMA correlation of the evaluated PM sensors demonstrated the best linearity achieved at low PM measurement range (0–400 µg m–3). As the Winsen ZH03A or Novafitness SDS011 sensor had a coefficient of variation below 10%, both of the sensors have an acceptable precision according to the EPA standard.