Gravity: SFA40 HCHO Sensor

Gravity SFA40 HCHO Sensor — based the latest SFA40 released by Sensirion— features a wide measurement range (0–1000 ppb), high accuracy (±20 ppb). Unlike most commercially available formaldehyde sensors, it offers extremely low cross-sensitivity. Traditional formaldehyde sensors based on electrochemical principles often respond to various volatile substances. For instance, using perfume near the sensor or placing an orange close to it can cause abnormally high readings. In contrast, the SFA40 shows almost no response to other non-formaldehyde volatile compounds — it reacts specifically and accurately to formaldehyde.