Air Quality Sensors VOC and NOx (MOX) Gas Pollutant Sensor
The SGP41-D-R4 is a compact digital gas sensor developed by Sensirion for indoor air quality monitoring applications. It is designed to detect volatile organic compounds (VOC) and nitrogen oxides (NOx) using Sensirion’s CMOSens® sensor technology. The device integrates sensing elements, analog front-end circuitry, calibration memory, and digital signal processing within a miniature surface-mount package, enabling accurate and reliable environmental sensing with minimal external components.
The sensor communicates through a standard I²C digital interface and is optimized for low-power operation, making it suitable for battery-powered and portable electronic systems. The SGP41 is intended for use in air purifiers, HVAC systems, smart home devices, wearable electronics, environmental monitoring equipment, and other applications requiring real-time indoor air quality assessment.
The device supports humidity-compensated measurements when paired with an external humidity and temperature sensor, improving long-term stability and measurement accuracy. Factory calibration eliminates the need for manual calibration during manufacturing.
Key Features
Digital VOC and NOx gas sensing
CMOSens® technology integration
I²C communication interface
Fully calibrated and linearized output
Humidity compensation capability
Low power consumption operation
Compact DFN surface-mount package
Fast response and recovery characteristics
Optimized for indoor air quality applications
RoHS and halogen-free compliant
Electrical Characteristics
Supply voltage operation compatible with low-voltage embedded systems
Low average current consumption suitable for portable devices
Integrated digital signal processing and calibration memory
I²C serial communication support with standard addressing
Stable operation across industrial temperature ranges
Mechanical Characteristics
Small DFN package optimized for compact PCB layouts
Surface-mount assembly compatible
Low-profile package suitable for space-constrained designs
Moisture-sensitive device requiring proper handling during assembly
Functional Characteristics
Simultaneous VOC and NOx sensing capability
Real-time indoor air quality monitoring
Compensation support for environmental humidity effects
Long-term measurement stability
Fast startup and measurement readiness
Designed for continuous sensing applications
Typical Applications
Indoor air quality monitoring systems
Smart thermostats and HVAC controllers
Air purifiers and ventilation systems
Smart home and IoT devices
Portable environmental monitoring equipment
Wearable health and wellness devices
Building automation systems
Consumer electronics requiring air quality detection
