> **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 # SparkFun CO2 Humidity and Temperature Sensor - SCD41 (Qwiic) **Type:** Product page · **SKU:** SEN-22396 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-co2-humidity-and-temperature-sensor-scd41-qwiic.html ([markdown](https://core-electronics.com.au/sparkfun-co2-humidity-and-temperature-sensor-scd41-qwiic.html.md)) The SparkFun CO2 Humidity and Temperature Sensor - SCD41 (Qwiic) features the SCD40 CO2 from Sensirion©... ## Pricing - **Price:** $134.95 (inc GST) — $122.68 AUD, exc GST - **Quantity discounts:** 5+ $119.00 (exc GST) · 25+ $116.55 (exc GST) · 100+ $111.64 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 18 and Aug 24. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN-22396:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN-22396:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **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 This SparkFun CO2 Humidity and Temperature Sensor features the next-generation SCD41 photoacoustic CO2 sensor for high-accuracy environmental readings. The SCD41 uses Sensirion's PASens® photoacoustic measurement system that combines narrow-band IR light and a microphone inside the sensing package capable of detecting concentrations from 0 to 40000 ppm with high accuracy over 400-5000 ppm ±(40 ppm+5%). The SCD41 has an integrated temperature and humidity CMos® sensor to improve accuracy. For additional accuracy, the SCD41 also accepts ambient pressure readings! All this functionality comes in our standard 1in. x 1in. Qwiic form factor and will seamlessly integrate into your Qwiic-based projects. However, Sparkfun still routed the I2C signals out to a set of 0.1in.-spaced pins for users who prefer a soldered connection. The SCD41 includes an automatic self-calibration routine to automatically adjust to its sensing environment over a seven-day calibration period. For best results, Sensirion recommends taking continuous readings for at least one hour a day of 'fresh air' for the calibration period to complete. This version of the SCD4X sensors also has a one-shot measurement option for an optimal reduction in power consumption. We've written an Arduino library to make reading the CO2, humidity, and temperature very easy. It can be downloaded through the Arduino Library manager: search for 'SparkFun SCD4x', or it can be found in the Documents tab above. *The [SparkFun Qwiic Connect System](https://www.sparkfun.com/qwiic) is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.* [Get started with the SparkFun SCD4x CO2 Hookup Guide](https://sparkfun.github.io/SparkFun_Qwiic_CO2_Sensor_SCD4X)### Features - I2C Interface (Qwiic-enabled) - I2C Address: **0x62** - 2x Qwiic Connectors - Supply Voltage Range: **2.4-5.5V** (**3.3V** Typ.) - Low Current Consumption: - Normal Mode: - Max: **205mA@3.3V** - Typ: **18mA@3.3V** - Low Power Mode: - Typ: **3.5mA@3.3V** - Single-Shot: - **0.5mA@3.3V** - Photoacoustic Measurement System - Sensirion's PASens Technology - Integrated Temperature and Humidity Sensor - Sensirion's CMOSens Technology - CO2 Output Range: 0-40,000ppm - CO2 Measurement Accuracy: ±(40ppm + 5% of reading) - Conditions: 400-5,000ppm - Humidity Range: 0-100%RH - Humidity Accuracy: ±9%RH (Full Range) - Temperature Range: -10°C-60°C - Temperature Accuracy: ±1.5 (Full Range) ### Documents - [Schematic](https://core-electronics.com.au/attachments/localcontent/SparkFun_Qwiic_CO2_Sensor_SCD41_92966969be4.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/SparkFun_Qwiic_CO2_Sensor_SCD41_18458b83407.zip) - [Board Dimensions](https://core-electronics.com.au/attachments/localcontent/SparkFun_Qwiic_CO2_Sensor_SCD4x-Dimensions_15577fc3342.png) - [Hookup Guide](https://sparkfun.github.io/SparkFun_Qwiic_CO2_Sensor_SCD4X) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/Sensirion_CO2_Sensors_SCD4x_Datasheet_96006f06534.pdf) (SCD4X) - [Qwiic Information Page](https://www.sparkfun.com/qwiic) - [SCD4X Arduino Library](https://github.com/sparkfun/SparkFun_SCD4x_Arduino_Library) - [Github Hardware Repo](https://github.com/sparkfun/SparkFun_Qwiic_CO2_Sensor_SCD4X) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN-22396-1.jpg)