- Uses a semiconductor TVOC sensor to calculate carbon dioxide concentration, delivering stable performance, low power consumption and long service life. - Large LCD display with clear color coding: green 400-799 ppm, yellow 800-1199 ppm, orange 1200-1599 ppm, red 1600-1999 ppm, and 2000 ppm flashing in four colours simultaneously for high visibility. - Compact and portable design for easy transport and placement. Back ventilation holes avoid accelerating convection between the air and the device while providing effective heat dissipation and accurate detection. - No calibration required for precise CO2 detection, suitable for monitoring in agricultural environments, production warehouses and laboratories. - Practical use scenarios: - Greenhouse crops: monitor CO2 levels to support optimal plant growth and yield. - Production warehouses: track air quality to maintain safe working conditions. - Laboratories: provide reliable CO2 readings for experiments and environmental control.