PCB design board MikroElektronika MIKROE-1630
Air quality click carries an MQ-135 sensor for detecting poisonous gases that impact air quality in homes and offices. The gas sensing layer on the sensor unit is made of tin dioxide (SnO2), which has lower conductivity in clean air. The conductivity increases with air pollution. The sensor reacts to ammonia (NH3), nitrogen oxides (NOx), benzene, smoke, CO2 and other harmful gases.