Arduino uno & lcd keypad shield Cover for MH-Z19B (CO2)

thingiverse

MH-Z19B CO2 Sensor The MH-Z19B NDIR infrared gas module is a compact, small-sized sensor that uses non-dispersive infrared (NDIR) technology to detect the presence of CO2 in the air. This sensor offers excellent selectivity and is not dependent on oxygen levels, ensuring a long lifespan. It features built-in temperature compensation, as well as UART output and PWM output capabilities. https://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf Case Study: Arduino Uno with 16x2 LCD and Keypad Shield This project combines an Arduino Uno board with a simple alphanumeric 16x2 LCD and keypad shield. The components used include: * 1 x Arduino Uno * 1 x Arduino LCD keypad shield (available at https://s.click.aliexpress.com/e/6FfJm68) * 1 x MH-Z19B CO2 sensor (available at https://s.click.aliexpress.com/e/bLB3B2H2) * 1 x DHT22 temperature and humidity sensor (available at https://s.click.aliexpress.com/e/bzGS8PAC) Test Results: View the test results video on YouTube at https://youtu.be/cZlm3aSU_SI Understanding CO2 Levels CO2 levels are measured in parts per million (PPM). The standard outdoor level is around 350 PPM, which is considered optimal for freshness. However, indoor levels can safely reach up to 600 PPM without adverse effects. As seen below, levels above 600 PPM can cause noticeable problems. * 350-450 PPM: Healthy, normal outside level * 450-700 PPM: Acceptable level * 700-1000 PPM: Complaints of stiffness and odors * 1000-2000 PPM: General drowsiness * 2500-5000 PPM: Adverse health effects expected * Above 5000 PPM: Time Weighted Average exposure limit (hours) Recommended CO2 level: Less than 1000 PPM. Science Technology Engineering Art Mathematics Visit our homepage at http://www.steamedu123.com or watch our YouTube channel at https://bit.ly/2JcFnQN