4. Analog output 0-2V; 5. High sensitivity and good selectivity for carbon dioxide. The sensor exhibits good sensitivity and selectivity for CO2, and is less affected by changes in temperature and humidity. It has good stability and reproducibility. Mainly used in air quality control systems, fermentation process control, and greenhouse CO2 concentration detection. Sensor features and test circuit. Product Information: Product Name: Carbon Dioxide Detection Sensor Module (with analog signal output, TTL level signal, temperature compensated output), Operating Voltage: DC 6V. Features: 1. Signal output indication; 2. Dual signal output (analog output and TTL level output); 3. TTL output valid signal is low level. (The indicator light illuminates when the output is low, allowing direct connection to a microcontroller). Main Applications: Air quality control systems; fermentation process control; greenhouse CO2 concentration detection;, Manufacturer: Jnchdghwa