Infineon has a similar sensor, https://www.infineon.com/cms/en/product/sensor/co2-sensors/pasco2v01/ https://www.infineon.com/cms/en/product/sensor/co2-sensors/

Infineon has a similar sensor, https://www.infineon.com/cms/en/product/sensor/co2-sensors/pasco2v01/ https://www.infineon.com/cms/en/product/sensor/co2-sensors/p... Neat little thing but you have to be sure to calibrate it.