Compare CO2 Monitors and Air Quality Sensors

Compare portable, battery-powered, Wi-Fi, PoE, and outdoor sensor options to find the best CO2 monitor or indoor air quality sensor for homes, schools, offices, commercial buildings, and field checks.

Best for Portable CO2 Checks

Choose Model F for a portable CO2 monitor with on-device display and data logging.

View Model F

Best for Battery Logging

Choose Model D for classrooms, inspections, and local data logging without Wi-Fi.

View Model D

Best for Connected Indoor Monitoring

Choose Model E-Lite for a Wi-Fi air quality monitor with CO2, PM, and VOC tracking.

View Model E-Lite

Best for PoE and Multi-Sensor Setups

Choose Model O for CO2, PM, VOC, NOx, pressure, Ethernet, and optional PoE deployments.

View Model O

For Offices and Commercial Buildings

Use Model E-Lite where Wi-Fi and cloud history are enough, or Model O where Ethernet, optional PoE, and broader sensing are better for fixed deployments.

For Classrooms and Schools

Use Model D for battery-powered CO2 logging, Model E-Lite for connected classroom dashboards, or Model O for multi-sensor rooms with wired network access.

For PoE Air Quality Monitoring

Choose Model O when a fixed sensor should run from USB-C or Ethernet infrastructure and report CO2, PM, VOC, NOx, temperature, humidity, and pressure.

Specification
Model F
Model C
Model D
Model X2
Model E-Lite
Model O v1
Model O
2026
CO₂ Sensor ✓ ✓ ✓ ✓
(option)		 ✓ ✓ ✓
PM Sensor ✓ ✓ ✓ ✓
VOC Sensor ✓ ✓ ✓ ✓
NOx Sensor ✓ ✓
Temperature ✓ ✓ ✓ ✓ ✓ ✓ ✓
Humidity ✓ ✓ ✓ ✓ ✓ ✓ ✓
Pressure ✓ ✓ ✓ ✓
Connectivity USB Wi-Fi (2.4GHz) USB Wi-Fi (2.4GHz)
LTE (option)		 Wi-Fi (2.4GHz) Wi-Fi (2.4GHz)
Ethernet		 Wi-Fi (2.4GHz)
Ethernet
Power Rechargeable battery (USB-C) Rechargeable battery (USB-C) Rechargeable battery (USB-C) USB-C Rechargeable battery (USB-C) USB-C or PoE USB-C or PoE
Use Case Portable, Indoor Portable, Indoor Portable, Indoor Outdoor Indoor Indoor Indoor
Warranty 1 year 1 year 1 year 1 year 1 year 1 year 1 year
More Details More Details More Details More Details More Details More Details More Details
How to Choose the Right Model
  • Portable CO2 monitor with display: Model F
  • Battery-powered CO2 monitor with local CSV logging: Model D
  • Connected indoor air quality monitor for homes, offices, and classrooms: Model E-Lite
  • PoE or Ethernet-ready multi-sensor monitor: Model O
  • Outdoor particulate and weather-exposed monitoring: Model X2
  • Need help with calibration or VOC interpretation? See the CO2 calibration guide and VOC guide.