The Sensirion SCD41 CO₂ Sensor Module is a compact environmental sensor designed for carbon dioxide measurement, temperature monitoring, and relative humidity sensing in one device. Available from BDTronics Bangladesh, this advanced sensor uses photoacoustic NDIR technology to provide reliable CO₂ measurements for indoor air quality monitoring, smart ventilation, greenhouse automation, and IoT environmental monitoring projects.

Featuring an I2C communication interface, a standard sensor address of 0x62, and STEMMA QT / Qwiic-compatible connectivity on supported module versions, the SCD41 is suitable for integration with ESP32, Arduino, and other compatible microcontroller platforms. Its compact design and low-power operation make it an excellent choice for embedded electronics, smart building systems, and custom air quality monitoring equipment.

Features:

• 3-in-1 Environmental Sensor: Measures carbon dioxide (CO₂), temperature, and relative humidity.

• Sensirion SCD41 Sensor: Built around Sensirion's compact SCD41 photoacoustic CO₂ sensing technology.

• Photoacoustic NDIR Technology: Uses infrared energy absorption and acoustic pressure-wave detection to determine CO₂ concentration.

• Wide CO₂ Measurement Range: Supports measurements up to 40,000 ppm according to the supplied module specifications.

• High CO₂ Measurement Accuracy: Specified accuracy of ±(40 ppm + 5% of reading).

• I2C Communication: Digital interface for connecting to compatible microcontrollers and development boards.

• I2C Address: Standard sensor address of 0x62.

• STEMMA QT / Qwiic Compatibility: Simplifies wiring when using a module equipped with the corresponding connector.

• Wide Supply Voltage: Specified module supply range of 3.3V–5.0V DC; verify the particular board's power requirements before connecting.

• Compact Form Factor: Suitable for space-constrained embedded and portable monitoring applications.

• Temperature and Humidity Monitoring: Provides additional environmental measurements alongside CO₂ concentration.

• Smart Ventilation Integration: Supports projects that adjust ventilation based on measured CO₂ levels.

• Low-Power Embedded Applications: Suitable for continuous environmental sensing in supported power configurations.

• Available at BDTronics: Suitable for electronics developers, students, researchers, and IoT product designers in Bangladesh.

Specifications:

• Product Name: SCD41 CO₂ Gas Sensor Module

• Sensor Model: Sensirion SCD41

• Product Type: CO₂, temperature, and humidity sensor

• CO₂ Sensing Principle: Photoacoustic NDIR

• CO₂ Measurement Range: 0–40,000 ppm, as specified for the supplied module

• CO₂ Measurement Accuracy: ±(40 ppm + 5% of reading)

• Additional Measurements: Temperature and relative humidity

• Communication Interface: I2C

• I2C Address: 0x62

• Connector Compatibility: STEMMA QT / Qwiic on compatible board versions

• Specified Supply Voltage: 3.3V–5.0V DC; confirm board-level input requirements

• Shipment Weight: Approximately 0.010 kg (10 g)

Note: The SCD41 sensor's measurement range and accuracy depend on the sensor and module specifications. Confirm the manufacturer's datasheet and specific breakout-board documentation before using these values in precision or safety-critical applications.

Applications:

• Indoor air quality monitoring

• CO₂ concentration measurement

• Smart home environmental sensing

• Smart ventilation and HVAC control

• Greenhouse CO₂ monitoring

• Plant growth and climate monitoring

• ESP32-based air quality monitoring

• Arduino CO₂ sensor projects

• IoT environmental monitoring systems

• Smart building automation

• Indoor environmental data logging

• Portable CO₂ monitoring devices

• Research and educational electronics projects

• Connected sensor networks and remote dashboards

How to Use the SCD41 CO₂ Sensor

• Connect the Power Supply: Connect the module to a compatible power source according to its board specifications. Check voltage requirements before applying power.

• Connect I2C: Wire SDA to the controller's SDA pin and SCL to its SCL pin. Connect GND to ground and the appropriate supply pin to the supported voltage.

• Confirm the I2C Address: Use an I2C scanner or sensor library to check for the sensor at address 0x62.

• Install a Compatible Library: Use a library that supports the Sensirion SCD4x family or the specific breakout-board manufacturer.

• Initialize the Sensor: Configure the sensor and start its supported measurement mode according to the library documentation.

• Read Environmental Data: Retrieve CO₂ concentration, temperature, and relative humidity through the supported sensor commands.

• Display or Transmit Readings: Send measurements to an LCD, serial monitor, data logger, or IoT dashboard using a compatible microcontroller.

• Allow Measurement Stabilization: Follow the sensor manufacturer's instructions for startup, measurement intervals, and operating conditions.

Compatible Development Platforms

• ESP32: Build Wi-Fi-connected CO₂ monitoring systems and remote environmental dashboards.

• Arduino: Develop embedded CO₂ measurement and data-logging projects using compatible I2C libraries.

• Raspberry Pi: Integrate sensor measurements into Python applications and supported monitoring platforms using a suitable I2C interface.

• IoT Platforms: Transmit readings through a compatible controller to a cloud dashboard or local server for visualization and analysis.

Compatibility depends on the selected controller, library, wiring, voltage levels, and breakout-board design.

Why Choose the SCD41 Sensor from BDTronics?

BDTronics supplies electronic components for embedded development, environmental monitoring, robotics, automation, and IoT projects in Bangladesh. The SCD41 provides three environmental measurements through a compact digital sensor, helping developers build connected monitoring systems without requiring separate sensors for each parameter.

Whether developing a smart ventilation controller, a greenhouse monitoring device, or an indoor air quality dashboard, the SCD41 offers a practical sensing solution for projects requiring CO₂, temperature, and humidity data.

Package Information

• Product: SCD41 CO₂ Sensor Module

• Sensor: Sensirion SCD41

• Interface: I2C

• Connector type: Depends on the supplied breakout-board version

• Package contents: Confirm the exact module, cable, and accessories listed in the BDTronics product offer.

Useful Technical Information

For accurate wiring, supported commands, measurement modes, and sensor operating limits, consult the documentation for the specific SCD41 breakout board and Sensirion SCD4x sensor family before integration.

BDTronics, SCD41 CO2 sensor Bangladesh, SCD41 CO₂ sensor, Sensirion SCD41 module, SCD41 temperature humidity sensor, I2C CO2 sensor, NDIR CO2 sensor, photoacoustic CO2 sensor, carbon dioxide sensor module, CO2 gas sensor, CO2 sensor for ESP32, Arduino CO2 sensor, STEMMA QT CO2 sensor, Qwiic CO2 sensor, I2C sensor 0x62, indoor air quality sensor, CO2 monitoring module, temperature humidity sensor module, greenhouse CO2 sensor, smart ventilation sensor, HVAC CO2 sensor, IoT air quality monitoring, environmental sensor module, digital CO2 sensor, Sensirion sensor Bangladesh, electronics components Bangladesh, BDTronics electronics