Sensirion SFA40
Miniature, low power consumption formaldehyde sensor for indoor air quality applications
SFA40 builds on the market success of its predecessor, SFA30, offering ultra-high selectivity to formaldehyde and long lifetime. It features unprecedented low power consumption and top performance – all in a miniature form factor. Engineered in Switzerland, it is designed for easy integration into air purifiers, indoor air quality monitors and air conditioners. All SFA40 sensors feature a digital I2C interface and are calibrated for accuracy at our manufacturing facility in Switzerland.
Specifications
Formaldehyde:
- Measurement range, 0 - 1000 ppb
- Accuracy, ±20 ppb or ±20% m.v.
- Sensor output, Formaldehyde concentration in ppb
- Cross sensitivity to ethanol, < 0.3, %
Generic:
- Supply voltage, 1.62 - 3.6 V
- Average supply current, 80 uA
- Max. supply current, 2 mA
- Interfaces, I²C
- Size (LxWxH), 13 x 10 x 2.4, mm
SFA40 Sensirion Sensors
SFA40 is a highly accurate formaldehyde (HCHO) sensor with very low cross-sensitivity to indoor gases like ethanol and NO2. Designed for purifiers, ACs, and IAQ monitors, it’s compact, low-power, and delivers reliable readings amid VOCs.