MH-Z19C NDIR CO₂ Air Quality Sensor
MH-Z19C NDIR CO₂ Air Quality Sensor
Product Overview
The MH-Z19C is a high-accuracy NDIR CO₂ sensor designed for indoor air quality monitoring, HVAC systems, smart home automation, and IoT applications. It measures carbon dioxide concentrations from 400ppm to 5000ppm with reliable long-term stability.
Description
The MH-Z19C CO₂ Air Quality Sensor is a compact and highly reliable carbon dioxide sensing module that uses NDIR (Non-Dispersive Infrared) technology for accurate CO₂ concentration measurement.
Designed for indoor air quality monitoring, ventilation control, HVAC systems, smart buildings, and IoT projects, the MH-Z19C provides stable and precise measurements while maintaining low power consumption.
Its compact size and multiple output interfaces make it suitable for integration with Arduino, ESP32, Raspberry Pi, STM32, and other embedded platforms.
The sensor is widely used in:
- Air quality monitoring systems
- Smart home automation
- Greenhouse monitoring
- HVAC control systems
- Industrial environmental monitoring
- Educational and research projects
The NDIR sensing method provides improved accuracy and long operational life compared to conventional gas sensing technologies.
Applications
- Indoor air quality monitoring
- Smart home automation
- HVAC systems
- IoT monitoring devices
- Greenhouse monitoring
- Environmental monitoring
- Building automation
- Industrial control systems
- Educational projects
- Arduino & ESP32 projects
Key Features
- NDIR CO₂ measurement technology
- 400ppm to 5000ppm detection range
- High measurement accuracy
- Long-term stability
- Compact module design
- Low power consumption
- UART communication support
- Suitable for IoT applications
- Compatible with Arduino and ESP32
- Reliable indoor air quality monitoring
| Specification | Details |
|---|---|
| Model | MH-Z19C |
| Sensor Type | NDIR CO₂ Sensor |
| Detection Gas | Carbon Dioxide (CO₂) |
| Measurement Principle | Non-Dispersive Infrared (NDIR) |
| Detection Range | 400 ~ 5000 ppm |
| Optional Range | Up to 10000 ppm |
| Accuracy | ± (50 ppm + 5% of Reading) |
| Operating Voltage | 5.0 ± 0.1V DC |
| Average Current Consumption | < 40mA |
| Peak Current Consumption | 125mA |
| Interface Level | 3.3V Logic (5V Compatible) |
| Output Interface | UART |
| Expected Lifespan | > 5 Years |
| Compatibility | Arduino, ESP32, Raspberry Pi, STM32 |
How It Works
The MH-Z19C uses NDIR infrared technology to measure carbon dioxide concentration. An infrared light source passes through a chamber containing air. CO₂ molecules absorb specific wavelengths of infrared light, and the sensor measures this absorption to calculate the CO₂ concentration. The measured value is then transmitted through the UART interface to a microcontroller such as Arduino, ESP32, or Raspberry Pi for monitoring and automation purposes.