Maybe contact Sensirion about the STCC4, better form factor and due for release any moment...They have a contact sales option and are usually helpful. https://s

Maybe contact Sensirion about the STCC4, better form factor and due for release any moment...They have a contact sales option and are usually helpful. https://sensirion.com/products/catalog/STCC4 https://sensirion.com/products/catalog/STCC4 (Not sure but thought maybe used in the SEN66 which is available now and covers most things including PPM/CO2/VOC/NOx)