The NEX AirGuard AG401 represents the latest in air purification technology, featuring a sophisticated 4-layer filtration system enhanced with nano-graphene oxide technology. This versatile unit is designed for both indoor and outdoor applications, effectively combining standard HEPA filtration, activated carbon absorption, and advanced nano-materials. The system includes comprehensive real-time air quality monitoring through multiple sensors (PM, VOC, NOx, CO2, O3), displayed on a 7-inch touch screen according to EPA's AQI standards. Its negative ion technology specifically enhances PM2.5 reduction by increasing the electrostatic force of small particles, causing them to form larger clusters that naturally settle due to gravity.

Highlights
NEX AirGuard is certified to eliminate < 97.22%+ of pathogens.
- Advanced 4-layer filtration system with nano-graphene oxide technology
- Real-time air quality monitoring with multiple sensors
- Negative ion generation for enhanced PM2.5 reduction
- 7-inch touch display with WiFi & Bluetooth connectivity
- UVC and Ozone free operation
Compare NEX AirGuard AG401 with other NEX AirGuard models.
The NEX AirGuard AG401 features a comprehensive 4-layer filtration system:
- First Layer: Standard air purifier filter
- Second Layer: HEPA filter
- Third Layer: Activated carbon filter for odor and toxic gas absorption
- Fourth Layer: Enhanced filter with nano-graphene oxide (GO) coating
The unit includes advanced sensor technology:
- SEN55 sensor for PM, RH/T, VOC, and NOx measurement
- SCD41 sensor for CO2 monitoring
- ZMOD4510 sensor for O3 and NOx detection
All measurements are displayed on a 7-inch capacitive touch screen powered by an ESP32-S3 dual-core processor, providing real-time air quality information according to EPA’s AQI standards. The system’s negative ion technology helps agglomerate PM2.5 particles, making them easier to capture and remove from the air.
Eliminate odors, pathogens and more ...
Enjoy a fresher, healthier environment with NEX AirGuard.

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Bus
How does it work?
TLDR: AirGuard transforms harmful particles into harmless water vapor.

Discover how NEX AirGuard revolutionary air purification technology transforms harmful particles into harmless water vapor, using nature's own cleaning mechanism. Unlike traditional filters that just trap pollutants, this advanced system actively seeks out and eliminates viruses, bacteria, mold, and harmful chemicals, while breaking down unpleasant odors at their source. Learn how this breakthrough technology creates a safer, cleaner living environment for you and your family.
Read more about how AirGuard works ->Which AirGuard is right for me?
For most users, we recommend the AG101 and AG201. If you want to see some numbers, checkout the comparison table.