SparkFun Indoor Air Quality Sensor - ENS160 (Qwiic)

Keep a close watch on your indoor environment with the SparkFun ENS160 Indoor Air Quality Sensor. Built around the ScioSense ENS160 digital petrol sensor, this compact breakout features four independent heaters and petrol-sensing elements based on advanced metal-oxide (MOX) technology. Instead of just giving you raw, complicated data, the on-board controller handles the heavy lifting by running intelligent algorithms directly on-chip! This allows you to pull instant, calibrated air quality readings without bogging down your microcontroller with complex calculations.

Intelligent On-Chip Air Analysis

ScioSense's TrueVOC^® technology ensures your readings comply with worldwide indoor air quality standards right out of the box. The independent hotplate control on the ENS160 provides outstanding sensitivity to volatile organic compounds (VOCs) while ignoring distracting background gases.

• Calculated Environmental Indexes: The on-chip brain automatically computes CO₂-equivalents (eCO₂), Total Volatile Organic Compounds (TVOC), and standard Air Quality Indices (AQIs).
• Built-In Compensation: The sensor automatically handles baseline management and temperature and humidity compensation to maintain output stability over time.

Additionally, while the pre-processed outputs are ready for immediate use, you can still access the raw sensor measurements if you want to implement your own custom filtering or algorithms.

Connectivity and Environmental Resilience

Whether you are designing a smart home HVAC system or an automated workshop ventilator, this sensor is built to survive and adapt to your specific setup.

• Plug-and-Play Qwiic Ecosystem: Connect the board to your system with the solderless Qwiic Connect System and Qwiic cables for a standard 3.3V I²C connection, letting you start prototyping in seconds.
• Breadboard-Friendly Breakout: Both the I²C interface (with selectable 0x53 default or 0x52 addresses) and SPI functionality are fully broken out to 0.1-inch-spaced pins for traditional wiring.
• Ozone and Humidity Immunity: Features effective ozone compensation and excellent stability across shifting temperature and humidity ranges to prevent data drift.

With its wide operating tolerances and standard digital interfaces, this multi-petrol sensor is an ideal choice for building automation, smart appliances, and long-term environmental datalogging layouts.

• Schematic
• Eagle Files
• Board Dimensions
• Hookup Guide
• Datasheet (ENS160)
• Fritzing Part
• Libraries:
  • Arduino
  • Python / MicroPython / CircuitPython
• Qwiic Information Page
• Learn More About DataLogger IoT
• GitHub Hardware Repo