MH-Z19B CO2 gas sensor NDIR Inframed carbon dioxide monitor 0-5000ppm

The MH-Z19B is a professional CO2 gas sensor that uses non-dispersive infrared (NDIR) technology to measure carbon dioxide levels in the air. This high-quality sensor is ideal for monitoring air quality in homes, offices, classrooms, and industrial environments. The CO2 gas sensor features a long service life, low power consumption, and integrated temperature compensation. The device is compact, easy to integrate into various systems, and provides UART, analog, and PWM outputs.

CO2 gas sensor — key features

• NDIR infrared technology — reliable and accurate carbon dioxide detection in the 400 to 5000 ppm range, no annual calibration required, automatic baseline calibration.
• High sensitivity and low power — average current consumption below 20 mA, peak current only 150 mA, ideal for battery-powered system applications.
• Quick reaction to change — warm-up time only 3 minutes, response to 90% change in less than 120 seconds, for real-time monitoring.
• Multiple output options — UART, analog (0-2V) and PWM signals, compatible with Arduino, Raspberry Pi and other microcontrollers.
• Resistant to interference and humidity — gold-plated gas chamber, waterproof housing, operating range from 0 to 95% RH, maintenance-free.
• Wide working temperature — stable and accurate operation from 0 °C to 50 °C, compatible with any climate conditions.
• Compact and versatile — small size, easy installation, suitable for air purification systems, HVAC, greenhouses and more.

Technical specifications

• Product model: MH-Z19B (MH-Z19E, MH-Z19D — identical features)
• Measured gas: Carbon dioxide (CO2)
• Supply voltage: 4.5–5.5 V DC
• Average current: <20 mA (at 5 V)
• Peak current: 150 mA (at 5 V)
• Interface level: 3.3 V (compatible with 5 V)
• Measurement range: 400–5000 ppm
• Warm-up time: 3 minutes
• Response time (T90): <120 seconds
• Operating temperature: 0-50 ° C
• Operating humidity: 0–95% RH (non-condensing)

Who is it suitable for and how to use it?

The CO2 gas sensor is perfect for those who want to monitor air quality in real time. Used in smart home automation systems, office buildings with sealed windows, laboratories and greenhouses. Practical tips: place the sensor in an airflow zone for the most accurate measurements, maintain a constant temperature, use a stable power supply. An ideal solution for direct monitoring or automatic ventilation control.

Buyer questions

Q: Does this sensor require calibration?
The MH-Z19B features automatic baseline calibration that works after 24 hours of continuous operation. Manual calibration is not required under normal conditions. If high accuracy or extreme conditions are required, it can be calibrated with reference carbon dioxide gas.

Q: Which microcontrollers and platforms is it compatible with?
This sensor is fully compatible with Arduino, Raspberry Pi, STM32 and any platforms that support UART, analog or PWM outputs. There are free libraries and examples on the GitHub platform to facilitate integration.

Q: What is product warranty and delivery time?
Warranty — 12 months from the date of purchase. Delivery — 5-15 business days to Lithuania. Easy returns if the product does not meet expectations within 30 days of purchase.

The CO2 gas sensor is an excellent choice for both beginners and professionals. It provides accurate measurements, low consumption and reliability, making it a worthwhile investment for cleaner and healthier air.

Sources: Carbon dioxide - Wikipedia | TopSmart store