Atmotube PLUS and PRO take VOC measurements every 2 seconds and store them to the memory every minute.
Atmotube PRO measures PM by timer and on demand (by button press or via application). It takes PM measurements every 1 second when on and store them to the memory every minute.
Atmotube PRO timer options for PM sensor:
All devices take tempearture, humidity and pressure measurements every 1 second and store them to the memory every minute.