MG-812 Datasheet | Winsen

Description MG812 gas sensor is chemical type gas sensor that adopts solid electrolyte cell principle, used to detect carbon dioxide. When sensors are exposed to CO2, battery is positive and negative electrode reaction, the sensor produces electromotive force between sensitive electrode and reference electrode, the output voltage signal can be detected carbon dioxide. Feature : Small sizes, low power-consumption, high sensitivity and good selectivity. Less affection by temperature and humidity. Steady performance and repeatability. Application Air quality control, ferment process control and CO2 detection in green house. Technical Index Model No. Standard pack Target gas Detection range Heater voltage VH Heater resistance RH Heater current IH Heater consumption PH Working temp Tao Storage temp Zero EM F Output signal △EM F Table 1 MG812 Metal shell CO2 350- 10000ppm CO2 5.0±0.1 V 60.0±5Ω 90±10m A 450±50m W -20～50℃ -20～70℃ 200-500m V ≧25m V/1000ppm CO2 VC or DC5.0V ± 0.1V Picture 2 sensor testing circuit. Inner resistance should be higher 100GΩ Picture 1 Structure Character Description EMF(m V) 330 325 320 315 310 305 300 295 290 285 280 响应恢复特性（3500ppm CO2) 5 10 15 时间（s2)0 Picture 3 sensitivity Vertical is output voltage, abscissa for gas concentration. All the tests in the figure is done under standard condition. The curve of the different colors represent in the output potential of gases. Picture 4 Response and Resume Put sensor into gas and move it away, check the output signal changing. Picture 5 Temperature character vertical is output voltage, abscissa for gas concentration. Picture 6 Humidity character vertical is...