Intuitive air quality insights – ENS161: the sensor with a brain

Air quality indoors

The ENS161 gas sensor from ScioSense sets a new standard for indoor air quality monitoring by combining state-of-the-art metal oxide (MOX) technology with an integrated microcontroller unit (MCU). This unique combination allows the sensor to process air quality data on its own, providing pre-calculated results without taxing the main host processor. With built-in sensor fusion algorithms and temperature/humidity compensation, it delivers valuable readings of TVOC, eCO2, and various air quality indices (including AQIs) without any post-processing, library or additional coding requirements from the user.

One of the key advantages of the ENS161 is its energy efficiency. The internal MCU handles all data conversion and computation, saving the host CPU from heavy processing loads. The sensor also operates in three different power modes: Standard, Low Power, and Ultra-Low Power. This flexibility allows you to balance energy consumption with performance, depending on the application’s needs. For instance, in Ultra-Low Power Mode, it consumes only 150uA while still providing consistent air quality data.

A distinctive feature of the ENS161 sensor is its rich array of post-processed outputs, including the newly introduced AQI-S output, a widely used air quality index on a 0-500 scale that makes real-time data interpretation easy. This freedom empowers users in smart homes, commercial buildings, or industrial settings to quickly adjust ventilation or activate purifiers, ensuring a healthier indoor environment:

  • In smart building automation systems it´s possible to boost fresh air intake when needed, optimizing air quality, and to reduce energy consumption during stable conditions.
  • In smart offices and commercial spaces, ready-to-use outputs trigger proactive air quality management, with real-time data available on dashboards or cloud platforms for easy monitoring.
  • In schools, hospitals, and fitness centers, clean air enhances wellness and productivity and supports better cognitive performance.


Furthermore, the seamless integration of the ENS161 into various platforms is made easy through its I2C and SPI interfaces, while the innovative LGA packaging ensures compact, reliable performance.

In short, the ENS161 gas sensor not only provides fully processed and ready-to-use air quality data but also minimizes power consumption and system complexity. Whether in homes, offices, or commercial spaces, this sensor offers a hassle-free and energy-efficient solution to ensure optimal indoor air quality.

ENS161 digital multi-gas metal oxide (MOX) sensor
ENS161 digital multi-gas metal oxide (MOX) sensor