? MH-Z19C CO₂ Sensor Module with Cable – High-Precision NDIR Air Quality Detector

The MH-Z19C is a compact and highly reliable NDIR CO₂ gas sensor module designed for accurate carbon dioxide detection. Based on Non-Dispersive Infrared (NDIR) technology, it provides stable and precise measurements without dependency on oxygen. The sensor features built-in temperature compensation, multiple output options (UART and PWM), and long operational life, making it ideal for indoor air quality monitoring systems.

⚙️ Key Features

• ? Small form factor with pin or terminal connection options
• ?️ Built-in temperature compensation for consistent accuracy
• ? Multiple output signals: UART (TTL 3.3V) and PWM
• ⚡ High sensitivity and low power consumption (<40mA average)
• ?️ Water vapor and poisoning-resistant design
• ? Gold-plated sensor chamber for durability
• ⏱️ Fast warm-up time (1 minute) and response time (T90 < 120s)
• ? Wide detection range: 400–5000 ppm CO₂
• ? Operating voltage: 5.0±0.1V DC
• ? Long service life: >10 years

? Typical Applications

• ? Smart home ventilation systems
• ? Indoor air quality monitoring (e.g., classrooms, offices)
• ❄️ HVAC and cooling control systems
• ? Air purifiers and air handling units

? Technical Specifications

• Model: MH-Z19C
• Target Gas: Carbon Dioxide (CO₂)
• Operating Voltage: 5.0 ± 0.1V DC
• Average Current: <40mA
• Peak Current: 125mA
• Interface Level: 3.3V (5V compatible)
• Detection Range: 400–5000 ppm
• Output: UART (TTL), PWM
• Warm-up Time: 1 minute
• Response Time: T90 < 120 seconds
• Operating Temperature: -10°C to +50°C
• Humidity Range: 0–95% RH (non-condensing)
• Storage Temperature: -20°C to +60°C
• Weight: 5g
• Lifetime: >10 years

? Package Includes

• 1 × MH-Z19C CO₂ Sensor Module
• 1 × Connecting Cable

The MH-Z19C is an ideal solution for engineers and developers building smart, energy-efficient, and health-conscious environments.