The Z19E carbon dioxide gas sensor is a general-purpose intelligent small sensor available in pin and terminal configurations. It uses non-dispersive infrared (NDIR) technology to detect CO2 in the air, offering good selectivity and no oxygen dependence. This high-performance sensor combines mature infrared absorption gas detection technology with precise optical and advanced circuit design. Features: - High sensitivity, low power consumption - Stable performance - Temperature compensation and linear output - Multiple output options: serial port (UART) TTL 3.3V and PWM waveform - Long service life - Resistant to water vapor interference, no sensor poisoning Applications: - HVAC systems - Air quality monitoring equipment - Ventilation systems - Air purification devices - Schools Specifications: - Model: Z19E - Detection gas: Carbon dioxide (CO2) - Power supply voltage: DC 5.0 0.1V - Average current: