> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Gravity: I2C SCD41 Infrared CO2 Sensor (400 - 5000 ppm)

**Type:** Product page · **SKU:** SEN0536 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-i2c-scd41-infrared-co2-sensor-400-5000-ppm.html ([markdown](https://core-electronics.com.au/gravity-i2c-scd41-infrared-co2-sensor-400-5000-ppm.html.md))

The Gravity: SCD41 Infrared CO2 Sensor based on Sensirion SCD41 sensor is a CO2, temperature and humidity three-in-one sensor....

## Pricing

- **Price:** $73.70 (inc GST) — $67.00 AUD, exc GST
- **Quantity discounts:** 6+ $63.65 (exc GST) · 12+ $60.97 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 03 and Sep 07.

## How to buy

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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

CO2 is a key factor for indoor air quality as high levels compromise human cognitive performance and well-being.

**This Gravity: SCD41 CO2 sensor is based on the SCD41 miniature CO2 sensor from Sensirion.** SCD41 builds on the photoacoustic NDIR sensing principle and Sensirion’s patented PAsens® and CMOSens® technology to offer high accuracy at an unmatched price and the smallest form factor. On-chip signal compensation is realized with the built-in temperature and humidity sensor, while temperature and humidity data outputs are also available.

SCD41 sensor detects the amount of energy that is absorbed by CO2 molecules. When pulsing the infrared emitter, CO2 molecules absorb infrared light periodically. This causes additional molecular vibration resulting in a pressure wave inside the measurement chamber. The higher the CO2 concentration, the more light is absorbed, and thus the greater the amplitude of this acoustic wave becomes. A microphone inside the gas chamber measures this, from which the CO2 concentration can then be calculated.

Click to learn more about [PAsens® technology](https://sensirion.com/products/technology/).

Click to learn more about [NDIR sensors](https://core-electronics.com.au/attachments/localcontent/477b737333d4d828abac9323e8bf1eb2_149975abf34.pdf).

![Gravity: SCD41 Infrared CO2 Sensor - I2C](https://core-electronics.com.au/attachments/localcontent/1_38408d530b9.jpg)

### Features

- CO2, temperature, and humidity, three in one
- Small size of 32\*27\*8mm
- Low power, average current<4mA

### Applications

- Indoor CO2 concentration monitoring
- Ambient monitoring in greenhouse
- Smart ventilation systems

### Specification

- Power Supply: 3.3V to 5V
- Average Operating Current: <4mA
- I2C Address: 0x62
- Product Size: 32\*27\*8mm/1.26×1.06×0.31"

**CO2**

- Accuracy: ±(40 ppm + 5% MV)
- Measuring Range: 400 - 5000 ppm
- Response Time: 60s

**Humidity**

- Typical Relative Humidity Accuracy: 6%RH
- Relative Humidity Measuring Range: 0 to 95%RH
- Response Time: 120s

**Temperature**

- Typical Temperature Accuracy: 0.8°C
- Temperature Measuring Range: -10 to 60°C
- Response Time: 120s

### Documents

- [Product wiki](https://wiki.dfrobot.com/SKU_SEN0536_Gravity_SCD41_Infrared_CO2_Sensor)
- [Schematics](https://core-electronics.com.au/attachments/localcontent/4482c60dae7dfada6884e717e83894da_477816d80c7.pdf)
- [Dimensions](https://core-electronics.com.au/attachments/localcontent/40a0a11823fde3e944bf4fa5890b4b12_12666f9af83.pdf)
- [Design-in guide](https://core-electronics.com.au/attachments/localcontent/3b565b4e51f83945db7012624ec8682d_48966d8e8ac.pdf)

### Parts List

- Gravity: SCD41 Infrared CO2 Sensor x1
- Gravity-4P I2C/UART Sensor Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0536-1.jpg)