Advanced environmental sensing module featuring true CO2 measurement using Photoacoustic NDIR technology. The SCD40 sensor module delivers accurate carbon dioxide readings along with temperature and humidity data in a compact breakout board. Designed for Arduino, ESP32, Raspberry Pi, and STM32 projects, it enables reliable indoor air quality monitoring and smart automation systems. Available from BDTronics Bangladesh for professional-grade sensing applications.

Features:

• True CO2 sensing using Photoacoustic NDIR technology

• Compact breakout board ready for plug-and-play integration

• Measures CO2, temperature, and humidity in one module

• High accuracy CO2 detection (±50 ppm + 5% reading)

• Built-in Automatic Self-Calibration (ASC) for long-term accuracy

• I2C interface for easy communication with microcontrollers

• Onboard voltage regulation and pull-up resistors

• Small size suitable for portable and embedded applications

• Stable performance for indoor air quality monitoring

• Compatible with Arduino, ESP32, Raspberry Pi, STM32

• Reliable sensor module from BDTronics Bangladesh

Specifications:

• Sensor Core: SCD40 (Photoacoustic NDIR)

• Target Gas: Carbon Dioxide (CO2)

• CO2 Measurement Range: 400 ppm – 2000 ppm

• Accuracy: ±(50 ppm + 5% of reading)

• Temperature Range: -10°C to 60°C

• Humidity Range: 0% – 100% RH

• Interface: I2C (Address: 0x62)

• Supply Voltage: 3.3V – 5V (with onboard regulation)

• Form Factor: Breakout PCB with 4-pin header

• Output Data: CO2, Temperature, Humidity

Applications:

• Indoor air quality monitoring systems

• Smart home automation and HVAC control

• CO2-based ventilation systems

• Health and environment monitoring devices

• IoT environmental sensing projects

• Greenhouse and plant growth monitoring

• Portable air quality meters and wearables

How to Use:

• Solder the included 4-pin header to the module

• Connect VCC, GND, SDA, SCL to microcontroller

• Use I2C communication (default address 0x62)

• Install Sensirion SCD4x library in Arduino IDE

• Read CO2, temperature, and humidity data via code

• Place sensor in open air for accurate readings

Usage Tips:

• Do not block the air intake filter on the sensor

• Avoid placing near vibration sources (motors, buzzers)

• Use 3.3V for ESP32 and low-noise applications

• Allow time for sensor stabilization after power-on

• Ensure proper airflow for accurate CO2 measurement

Package Includes:

• 1 x SCD40 CO2 Sensor Module

• 1 x 4-Pin Header Strip

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