Tilswall 3-in-1 Indoor Air Quality Monitor Portable CO2 Monitor

High-Precision CO₂ Sensor

Equipped with an advanced semiconductor sensor for stable, accurate real-time carbon dioxide measurement.

3-in-1 Air Quality Monitor

Large LCD display clearly shows CO₂ concentration, temperature, and humidity at the same time.

Accurate Measurement with Air Convection Design

Optimized airflow circulation improves accuracy, with a wide measuring range from 400 to 5000 ppm.

Smart Color-Coded Air Quality Indicator

4-color LED ring instantly displays air quality levels: Green (0–799 ppm), Light Green (800–1199 ppm), Orange (1200–1599 ppm), Red (1600–1999 ppm); all colors flash when exceeding 2000 ppm.

Energy-Efficient & Long-Lasting

Designed for low power consumption, strong anti-interference performance, and long service life for continuous monitoring.