Sensirion SCD41 CO2, Temperature & Humidity Sensor Module - I2C Interface, Blue PCB

Name: Sensirion SCD41 CO2, Temperature &amp; Humidity Sensor Module - I2C Interface, Blue PCB
Brand: Sensirion
SKU: SENS-0745
Price: 2459.00 INR
Availability: OutOfStock

₹2,459.00 (Inclusive of all taxes)

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The Sensirion SCD41 module is a high-precision, photoacoustic NDIR sensor for measuring CO2 concentration, temperature, and relative humidity via I2C. It is designed for seamless integration with Arduino, Raspberry Pi, ESP32, and other 3.3V/5V microcontroller platforms for indoor air quality monitoring and smart building applications.

Features

High-precision NDIR-based CO2 sensing with integrated temperature and humidity compensation.
Wide operating voltage range (2.4V to 5.5V DC) and ultra-low power consumption for battery-powered IoT.
Standard I2C digital interface with 2.54mm pin header for easy prototyping and system integration.
Robust measurement range (400–5000 ppm CO2) suitable for IAQ, HVAC, and smart ventilation control.
Compact blue PCB module with all necessary components for immediate evaluation and deployment.

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Description

The SCD41 module integrates Sensirion’s advanced photoacoustic sensing (PAS) technology to deliver precise, long-term stable CO2 measurements without the need for frequent recalibration. The onboard SHT40 sensor provides simultaneous temperature and humidity readings, which are used to automatically compensate the CO2 data for enhanced accuracy across varying environmental conditions.

Designed for low-power operation, the module features a single-shot measurement mode that minimizes average current draw, making it ideal for energy-conscious applications in smart buildings, IoT environmental monitors, and demand-controlled ventilation systems. The digital I2C output ensures noise-immune communication and straightforward integration with most microcontrollers and single-board computers.

Key Features

Incorporates Sensirion's photoacoustic NDIR CO2 sensor (SCD41) for high accuracy and long-term stability.
Integrated SHT40 sensor provides precise temperature and humidity data for automatic environmental compensation.
Ultra-low power architecture with an average current consumption as low as 0.4 mA, enabling battery-powered designs.
Wide supply voltage compatibility from 2.4V to 5.5V, supporting both 3.3V and 5V logic systems.
Standard 2.54mm pitch pin header presents VCC, GND, SDA, and SCL for plug-and-play connectivity.
Compact form factor (22mm x 13mm) on a blue FR4 PCB for space-constrained applications.
Factory calibrated sensor requires no end-user calibration, simplifying deployment.
Robust CO2 measurement range from 400 ppm to 5000 ppm covers typical indoor air quality scenarios.

Applications

Indoor Air Quality (IAQ) monitoring and dashboards for offices, schools, and smart buildings.
Demand-Controlled Ventilation (DCV) systems in HVAC and energy management.
Portable and fixed IoT environmental sensors for smart home and workplace wellness.
CO2 monitoring in greenhouses, Grow rooms, and agricultural environments.
Embedded sensing for air purifiers, smart thermostats, and ventilation controllers.

Technical Specifications

Product Type	CO2, Temperature & Humidity Sensor Module
Sensor Model	SCD41 (CO2), SHT40 (Temp & Humidity)
CO2 Measurement Range	400–5000 ppm
CO2 Accuracy	±(40 ppm + 5% of reading)
Temperature Range	-10°C to +60°C (Sensor-specific; consult SHT40 datasheet)
Humidity Range	0% to 100% RH (Sensor-specific; consult SHT40 datasheet)
Operating Voltage	2.4V–5.5V DC
Communication Interface	I2C
Header Pitch	2.54 mm
Average Current Consumption	~0.4 mA (@5V, 1 measurement per 5 minutes)
Module Dimensions	22 mm x 13 mm (PCB)
Module Weight	Approx. 2 g
Module Color	Blue PCB

Frequently Asked Questions

What is the operating voltage range for the SCD41 module, and is it 5V tolerant?

The SCD41 module operates from 2.4V to 5.5V DC, making it directly compatible with both 3.3V and 5V microcontroller systems like Arduino Uno and ESP32. The I2C communication lines are also designed to be tolerant of this full voltage range, allowing for safe interfacing without level shifters in most cases.

How do I connect and read data from the SCD41 sensor module?

Connect the module's VCC and GND pins to your board's power supply (2.4-5.5V). Link the SDA and SCL pins to the corresponding I2C pins on your microcontroller (e.g., Arduino). Use the official Sensirion SCD4x library or compatible driver to initialize the sensor and request single-shot measurements for CO2 concentration, temperature, and humidity over the I2C bus.

What is the accuracy and measurement range of the CO2 sensor?

The SCD41 provides CO2 measurements from 400 ppm to 5000 ppm, which is ideal for indoor air quality monitoring. Its accuracy is specified as ±(40 ppm + 5% of reading). The integrated temperature and humidity sensor provides data used to automatically compensate the CO2 reading, ensuring stable performance across environmental changes.

Is this sensor suitable for battery-powered or low-power IoT applications?

Yes, the SCD41 is engineered for low-power operation. In single-shot measurement mode, taking one reading every 5 minutes, the average current consumption can be as low as 0.4 mA at 5V. This makes it highly suitable for battery-powered IoT nodes, wireless sensor networks, and other energy-constrained environmental monitoring systems.