Description
The SFA30 is Sensirion’s new digital formaldehyde sensor designed for easy integration into air purifiers, demand-controlled ventilation systems, or indoor air quality monitors.
What is Formaldehyde?
Formaldehyde (chemical formula H2-C=O or often HCHO) is a colorless gas and the simplest organic molecule containing C, O, and H. It is highly reactive and has several natural and man-made sources. Formaldehyde concentrations are much higher indoors than outdoors and hence formaldehyde is qualified as a very specific indoor pollutant.
CMOSens Technology for Formaldehyde Sensing
The SFA30 is based on an amperometric electrochemical measurement principle enabling lowest cross-sensitivity and an excellent long-term stability. At the working electrode, formaldehyde is decomposed and an electrical current flows between the counter electrode and the working electrode. The current is proportional to the formaldehyde concentration. Thanks to the Sensirion-specific chemistry the sensor is selective to formaldehyde with respect to other VOCs.
- Low cross-sensitivity to ethanol
- Long-term stability and 6 years’ service life time
- Patented electrochemical cell with anti-dry technology
- I2C/UART interface with lifetime-calibrated output
- Fully temperature and humidity compensated via Sensirion RHT sensor
