The MQ135 sensor has a wide range of applications in indoor air quality monitoring, gas leak detection and environmental detection. In addition to carbon dioxide (CO2), it also detects other gases such as volatile organic compounds (VOCs), alcohol vapors and smoke. By integrating with circuits and microcontrollers such as Arduino (or a compatible board such as Dasduino), real-time systems can be developed to track and analyze gas levels. This allows appropriate action to be taken to ensure a healthy and safe environment. The MQ135 module requires a preheating time before accurate readings are available. It operates at 5 V and consumes approximately 150 mA. The breakout of the MQ135 sensor provides both digital and analog data that can be retrieved via the easyC system. Technical data https://elecena.pl/product/25608636/333125-developer-boards-gas-sensor-co2-petrol-smoke-mq-135 2024-03-19 https://elecena.pl/product/25608636/333125-developer-boards-gas-sensor-co2-petrol-smoke-mq-135 2025-09-03