SparkFun CO2 Sensor - STCC4/SHT40 (Qwiic)
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Measure CO2 alongside temperature and humidity with this dual-sensor Qwiic breakout. An STCC4 uses thermal conductivity for CO2 sensing, and an SHT40 supplies environmental readings for compensation. Both Sensirion devices communicate over I2C, providing a compact input for an indoor air-monitoring project with a compatible embedded host.
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SparkFun SKU: SEN-31536 · Category: Environmental & CO2 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.