DFRobot Gravity: Analog CO2 Gas Sensor for Arduino | CO2 Gas Detector

Product Information

MQ-135 Gas Sensor is an air quality sensor for detecting a wide range of gases, including NH3, NOx, alcohol, benzene, smoke, and CO2. Using the USB cable type A – B male/male, connect one end into your PC and the other into the Arduino Uno board… you’ll know which end goes where, trust me! Now that all four of the jumper cables have been placed, your Arduino board should look a lot like some sort of spider monster.

d) Connect the sensor bridge to the Arduino using the male-to-male jumper wires as shown in the wiring diagram. You can also utilise CO2 sensors in horticultural applications and they can be very useful to create the correct growing conditions in mushroom cultivation.CO2 is produced indoors when people breathe, and in an enclosed space the levels can often rise above 1000ppm and make you feel drowsy, sleepy or even lead to headaches. External power supply (7~12V) is necessary to supply the microcontroller board when you using this CO2 sensor module. I was a bit concerned by reading the other reviews, but after doing a small amount of calibration work (read the Questions section to find out how to calibrate - it's pretty simple), I was able to get this sensor working very well.

If you use lower cost parts based on other technologies they will be susceptible to cross sensitivity from other gases (including water / humidity), more suceptible to signal drift, less acurate as calibration is expensive etc. LibreCO2: Simple CO2 meter using Arduino UNO and CO2 low cost sensor (Sensirion SCD30, Winsen MH-Z14 or MHZ-19 and Cubic CM1106). b) Using a 1/8" endmill, cut just on the inside of the drawn rectangle as close to the line as possible. timeToString ( ) ; 129 130 for (int i = 0 ; i