Winsen MH-Z14 NDIR CO2 Sensor Module - UART/Analog/PWM Output
The Winsen MH-Z14 is a compact NDIR CO2 sensor module offering UART, analog voltage, and PWM output for seamless integration with Arduino, Raspberry Pi, ESP32, and industrial PLCs. Operating on 5V DC, it provides accurate, temperature-compensated CO2 concentration measurement from 0 to 5000 ppm.
Features
- NDIR (Non-Dispersive Infrared) sensing principle for high selectivity and long-term stability.
- Triple output interface: UART serial, analog voltage (0-3V), and PWM signal for flexible system integration.
- Built-in temperature sensor for automatic compensation, ensuring accuracy across varying environmental conditions.
- Low power consumption with an average current draw below 85 mA at 5V DC operation.
- Compact form factor (57.5 x 34.7 x 16 mm) suitable for embedded air quality monitoring systems.
Out of stock
The MH-Z14 CO2 sensor module utilizes a mature NDIR detection method, where an infrared source, optical path, and detector measure CO2-specific absorption. This technology provides excellent selectivity against other gases, is non-oxygen dependent, and offers a long operational lifespan free from sensor poisoning. An integrated thermistor provides real-time temperature data for compensation, ensuring stable readings.
The module features a robust circuit design with signal conditioning that outputs calibrated CO2 concentration data via a UART interface (TTL level 3.3V), a linear analog voltage proportional to the gas level, and a duty-cycle modulated PWM signal. Its compact, board-level package is engineered for reliable performance in HVAC systems, indoor air quality monitors, and industrial safety applications.
Additional Information
| Weight | 0.015 kg |
|---|---|
| Dimensions | 5.75 × 3.47 × 1.6 cm |
