SCD40 SCD41 CO2 Temperature & Humidity Sensor Module I²C
SCD40
$40.10
Sale price
$40.10
Regular price
$49.62
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SCD40 SCD41 CO2 Temperature & Humidity Sensor Module I²C
$40.10
Sale price
$40.10
Regular price
$49.62
The SCD40 / SCD41 Gas Sensor Module is a compact, high-precision sensor that simultaneously measures CO₂ concentration, temperature, and humidity — all in a single, easy-to-integrate SMD package. Built on Sensirion's proven photoacoustic sensing technology, it communicates seamlessly over I²C, making it the ideal choice for air-quality monitors, smart home systems, HVAC controllers, and IoT projects.
Key Features
- Dual Model Options: Choose SCD40 (standard range, ideal for most applications) or SCD41 (extended low-power mode for battery-operated devices)
- 3-in-1 Sensing: Measures CO₂ concentration, ambient temperature, and relative humidity simultaneously
- I²C Interface: Simple two-wire communication for fast integration with Arduino, Raspberry Pi, ESP32, and other microcontrollers
- 5V Supply Voltage: Compatible with standard development boards and embedded systems
- SMD Package: Low-profile, space-saving form factor perfect for PCB integration
- High Accuracy: Delivers reliable, repeatable readings suited to professional and hobbyist projects alike
- Quantity: 1 module per order
Specifications
| Models Available | SCD40, SCD41 |
| Measurements | CO₂, Temperature, Humidity |
| Communication Protocol | I²C |
| Supply Voltage | 5V |
| Package Type | SMD |
| Condition | New |
| Quantity | 1 pc |
What Can You Build With It?
This versatile sensor module opens up a wide range of projects:
- Indoor air-quality monitoring stations
- Smart ventilation and HVAC control systems
- Greenhouse and grow-room environment controllers
- Office or classroom CO₂ level indicators
- Portable, battery-powered environmental loggers (SCD41)
Compatible With
Arduino, Raspberry Pi, ESP8266, ESP32, STM32, and virtually any microcontroller with an I²C bus.
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Frequently Asked Questions
Q: What is the difference between the SCD40 and SCD41 CO₂ sensor modules?
A: Both the SCD40 and SCD41 measure CO₂, temperature, and humidity over I²C. The SCD41 adds an advanced low-power periodic measurement mode, making it better suited for battery-powered or energy-constrained applications, while the SCD40 is ideal for continuously powered systems.
Q: Which microcontrollers are compatible with the SCD40/SCD41 sensor module?
A: The SCD40 and SCD41 modules use a standard I²C interface and are compatible with a wide range of development boards, including Arduino (Uno, Mega, Nano), Raspberry Pi, ESP8266, ESP32, STM32, and most other microcontrollers that support I²C communication at 5V.
Q: What CO₂ measurement range does the SCD40/SCD41 sensor cover?
A: The SCD40 and SCD41 are designed to measure CO₂ concentrations across a range suitable for indoor air-quality monitoring — from typical fresh-air levels up to elevated concentrations found in occupied rooms, making them ideal for ventilation control and environmental monitoring projects.
Q: How do I connect the SCD40/SCD41 module to my project?
A: Connect the module's VCC pin to 5V, GND to ground, and wire the SDA and SCL pins to your microcontroller's I²C data and clock lines respectively. Libraries are available for Arduino and MicroPython to get readings up and running quickly.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.