SparkFun CO2 Sensor - STC31 (Qwiic)
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Measure higher carbon-dioxide concentrations with an STC31 sensor connected through Qwiic. The Sensirion IC uses thermal-conductivity sensing and offers separate concentration ranges up to 25 or 100 percent by volume. Check the selected range and required environmental compensation before integrating this board into a gas-measurement project.
Before you buy
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SparkFun SKU: SEN-29260 · Category: Environmental & gas sensors
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Official product specifications and documentation
EAR summary based on supplier documentation; this is not a hands-on review. Product identity rechecked during the October 25, 2026 sprint. Current SparkFun Originals eligibility was verified with the supplier’s Original: Yes filter during the October 25, 2026 sprint. Affiliate eligibility remains subject to SparkFun's program terms.