Breaking the size barrier in CO₂ sensing

Size comparison between SCD30 (NDIR) and SCD4x (PASens® technology) (Source: Sensirion AG)
Figure 1: Absorption bands of typical gases occurring in the atmosphere (Source: Hodgkinson & Tatam, Meas. Sci. Technol. 24)
Figure 2: Diagram of the setup of a non-resonant photoacoustic gas sensor (Source: Sensirion AG)
Figure 3: Key components developed by Sensirion for PASens® technology (Source: Sensirion AG)
Overview of applications in heating, ventilation and air conditioning (Source: Sensirion AG)