Formaldehyde Sensor - SFA40 (Qwiic)

Accurately measure indoor formaldehyde (CH2O/HCHO) levels with this low-power, Qwiic-enabled SFA40 sensor from Sensirion.

The SparkFun SFA40 Qwiic Formaldehyde Sensor is a unique indoor gas sensor that measures low concentrations of formaldehyde (CH2O/HCHO) with excellent accuracy, even in the presence of other similar gases.

The SFA40 from Sensirion is an electrochemical sensor that maintains accurate formaldehyde measurements in environments that have other common indoor gases such as ethanol or nitrogen dioxide. This sensor also comes pre-calibrated with a unique manufacturer serial number for easy identification.

To ensure your readings are as precise as possible, the SFA40 provides several key performance benefits:

• Wide Measurement Range: Detects formaldehyde gas concentrations from 0 to 2000 parts per billion (ppb).
• High Accuracy: Delivers measurements within ±20 ppb or ±20% of the total measured value, whichever is larger.
• Low Cross-Sensitivity: Highly resistant to interference, with a cross-sensitivity to ethanol of just 0.3%.
• Environmental Compensation: An integrated temperature and humidity sensor automatically adjusts for changing ambient conditions.

More information is available on the website of Sparkfun.