S8606 CO2 detector features a carbon dioxide sensor and temperature and humidity sensor. The device is designed to measure carbon dioxide levels, temperature, and humidity in the environment, making it suitable for use in agriculture, aquaculture, and industrial applications such as greenhouses, livestock farms, beverage production, energy-saving processes, and underground operations. It is also ideal for monitoring indoor air quality in everyday environments including kindergartens, schools, offices, shopping malls, supermarkets, transportation hubs, and hospitals. Monitoring CO2 levels helps improve air quality, enhance learning and work efficiency, and support public health and safety. Features: - Measures CO2 concentration, temperature, and humidity - Temperature unit switchable between Celsius and Fahrenheit - HOLD function to freeze measurement readings - Two-line LCD display showing CO2, temperature, and humidity simultaneously - Backlight color indication (green/yellow/red) based on CO2 levels - Auto power-off function Uses 3 x 1.5V AAA batteries (not included). The measuring range is 400-5000ppm. If levels exceed 5000ppm, the display will show H1 and emit a continuous beep. The unit must be powered off and restarted before further testing. Note: S8601 uses a semiconductor sensor. Product design, color, or appearance may vary slightly due to updates or manufacturing differences. Please consider this before ordering if specific外观 characteristics are important to you. Material: Plastic Color: Black + Red Package Contents: 1 x Detector Note: Light reflection and screen differences may cause slight variations in the color shown in images compared to the actual product. Measurement error allowance is +/- 1-3cm.