... large capability memorizer 4)School CO2 monitor with data logger A, Feature:Real-time monitoring carbon dioxide ... alternative a ventilator and a CO2 generatorAn internal data logger is used to record CO2 measurements ... With super large capability memorizer, it can save data of up to 115 daysProvide the software to ... memorizer by any USB disk, and copy the data to a PC B, Application:Used in schools ...