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        Sensor CO2 carbon dioxide level 
 be connected to an analog input pulses smart meters smart MAC-D105. 
 
 CO2 sensor measures the concentration of carbon dioxide CO2 0-5000ppm (number of particles per million CO2 air particles). < br /> 
 Main characteristics: 
 voltage: 5 V 
 Operating temperature: 0 ... + 50 ° C 
 Operating current: 60mA less; . 
 peak 150mA Measurement range: 0-5000ppm 
 Accuracy: ± 50ppm 
 heating time: 3 minutes    
                                    