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

The MH-Z19C is a compact, highly reliable NDIR CO₂ gas sensor module engineered for precise carbon dioxide detection. Utilizing Non-Dispersive Infrared (NDIR) technology, this sensor delivers stable and accurate measurements, independent of oxygen levels. With built-in temperature compensation, multiple output options (UART and PWM), and a long lifespan, it's the perfect choice for indoor air quality monitoring systems.

Key Features

• Compact design: Small form factor with pin or terminal connection options
• Temperature compensation: Built-in feature for consistent accuracy
• Multiple output signals: UART (TTL 3.3V) and PWM
• Energy efficient: High sensitivity and low power consumption (<40mA average)
• Durable: Water vapor and poisoning-resistant design with a gold-plated sensor chamber
• Quick response: 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 lifespan: >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 the optimal solution for engineers and developers aiming to create smart, energy-efficient, and health-conscious environments. Whether you're working with Arduino, Raspberry Pi, or other microcontrollers, this module delivers reliable, high-precision CO₂ detection.