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SCD40 SCD41 High Precision Gas Sensor Module 2 in 1 CO2 Temperature and Humidity Detection Sensor I2C Communication 4PIN

SCD40 SCD41 High Precision Gas Sensor Module 2 in 1 CO2 Temperature and Humidity Detection Sensor I2C Communication 4PIN

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Specifications

Brand Name
udevqal
Origin
Mainland China
High-concerned chemical
None
Condition
New
Type
Module
is_customized
Yes
Choice
yes

Product Description

SCD40 SCD41 High Precision Gas Sensor Module 2 in 1 CO2 Temperature and Humidity Detection Sensor I2C Communication 4PIN

SCD41:

CO2 Measurement Accuracy: ± (40ppm+5%MV)

Measurement range: 400-5000 ppm (low power)

Accuracy: ±40 ppm

Relative Humidity Measurement Range: 0-95%RH

Typical RH accuracy: 6%RH


SCD40:

CO2 Measurement Accuracy: ± (50ppm+5%MV)

Measurement range: 400-2000 ppm (low power)

Accuracy: ±50 ppm

Relative humidity measurement range: 0-95%RH

Typical RH Accuracy: 6%RH


Product Description:

Carbon dioxide is a key indicator of indoor air quality impairing human cognitive ability and well-being, SCD40/SCD41 is Sensirion's next generation of miniature carbon dioxide sensors, the SCD40/SCD41 boasts high accuracy and cost-effective performance, the module leads the power supply and communication pins out with a 2.54mm pitch row of pins interface. The on-chip temperature and humidity compensation is realized by the built-in temperature and humidity sensor for humidity and temperature measurement. SCD40/SCD41 can realize intelligent adjustment of indoor ventilation system according to the carbon dioxide concentration, and the indoor air quality can help to maintain a healthy and efficient environment with low carbon dioxide concentration over a period of time.


Characteristics:

1. Reference accuracy, specified range,SCD40:400-2000 ppm SD41:400-5000 ppm

2. Supply voltage range: 2.4-5.5 V

3. High accuracy: ± (40 ppm + 5%)

4. Digital I2C interface

5. Integrated temperature and humidity sensors

6. Low power operation to <0.4 mA averaged @ 5 V, 1 meas./5 minutes


Interface Definitions:

1.GND: Power negative input port

2.VDD: Power supply positive input port

3.SCL: I2C clock port

4.SDA: I2C data port

Pros & Cons

Pros

  • 2-in-1 multi-sensor for CO2, temperature, and humidity measurements in one unit
  • High accuracy CO2 detection with ±(40ppm+5%MV) rating
  • Simple I2C communication interface for easy microcontroller integration
  • Low-power operation for battery-powered projects

Cons

  • Exact physical dimensions are not provided, making enclosure fit verification difficult
  • Relative humidity accuracy is only ±6%RH, lower than some competing sensors
  • No included mounting hardware or wiring harness for quick setup

Common Questions

What communication interface does this sensor module use?

It uses I2C communication for easy connection to microcontroller boards, per product specifications.

What environmental measurements can this SCD41 module take?

It detects CO2 levels (400-5000ppm), temperature, and relative humidity.

What materials is this sensor module constructed from?

It is a printed circuit board (PCB) module with integrated gas sensing components and a 4PIN wiring connector.

What are the physical dimensions of this sensor module?

Exact physical dimensions are not listed in the provided product specifications, but it is a compact modular design for easy integration.

Where will this sensor module ship from?

This product originates from Mainland China, so standard shipping will be dispatched from this region.

Product information last updated on December 1, 2025