Formaldehyde Sensor Module for HVAC and Indoor Air Quality Applications

Written by Glyn High Tech

December 8, 2020


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.

Based on Sensirion’s electrochemical technology, the SFA30 offers excellent formaldehyde sensing performance with a uniquely low cross-sensitivity to other VOCs. The sensor module’s on-board SHT sensor provides accurate humidity and temperature readings and enables a fully temperature/humidity compensated and factory calibrated formaldehyde concentration output in ppb. Selectable digital UART and I2C interface options, a standard electrical connector, and versatile mounting options make the integration easy. Relying on Sensirion’s experience in environmental sensing and a patented electrochemical cell with anti-dry technology, the SFA30 offers excellent long-term stability and 6 years service Lifetime.


  • Accuracy: ±20 ppb or ±20% of measured value, whichever is larger
  • Interface: I²C / UART
  • Supply voltage range: 3.3 V or 5.0 V
  • Current consumption: 1.0 mA (average)
  • Measurement range: 0 to 1,000 ppb
  • Sensor output: Formaldehyde concentration in ppb, RH, T
  • Response time: <2 min
  • Limit of detection: <20 ppb


  • Air Purifiers
  • Air Conditioners
  • Indoor Air Quality Monitors

Products Details:

Technology and Benefits


Technology Benefits
Patented electrochemical cell with anti-dry technology Excellent long-term stability and 6 years service lifetime
Integrated SHT humidity and temperature sensor On-board RH and T compensation, additional RH and T Output
Uniquely low cross sensitivity to other VOCs Reliable Formaldehyde measurements in real life conditions
Fully factory calibrated module Easy to use and life-time calibrated


Start evaluating the SFA30 today

The SEK-SFA30 evaluation kit has been designed for easy evaluation of Sensirion’s SFA30 formaldehyde sensor. In addition to the SFA30 sensor module, the SEK-SFA30 comes with a UART-USB cable for a plug-and-play connection to a PC and evaluation with Sensirion’s easy-to-use SEK-ControlCenter viewer software. For connecting the sensor to prototyping platforms such as Arduino or RaspberryPi, a 7-pin jumper wire cable is provided.

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Datasheet here

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