SparkFun Formaldehyde Sensor - SFA40 (Qwiic)
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Measure formaldehyde with the Sensirion SFA40 on this Qwiic breakout. The electrochemical sensor comes calibrated with a manufacturer serial number, and I2C connects it to the host. It provides an input for indoor-gas experiments, with the stated concentration range defining one aspect of the configuration that should be checked before integration.
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Review measurement conditions, cross-sensitivity and calibration requirements for the intended application.
SparkFun SKU: SEN-31669 · Category: Formaldehyde 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.