S8606 CO2 detector features a carbon dioxide sensor along with temperature and humidity sensors. It is designed to measure carbon dioxide levels, temperature, and humidity in the environment and is widely used in agriculture, aquaculture, and industrial applications such as greenhouses, livestock farms, beer and carbonated beverage production, energy-saving and environmental protection product manufacturing, and underground operation safety.In everyday environments including kindergartens, schools, office buildings, shopping malls, supermarkets, stations, and hospitals, monitoring carbon dioxide concentration helps improve air quality, enhance learning and work efficiency, and support public health and safety.Features: - Measures CO2 concentration, temperature, and humidity - Temperature unit selectable between C and F - HOLD function to freeze measurement readings - Two-line LCD display showing CO2, temperature, and humidity simultaneously - Backlight color indication: green, yellow, or red based on CO2 levels - Auto power-off function - Requires 3 x 1.5V AAA batteries (not included)The instrument has a measurement range of 400-5000ppm. If CO2 levels exceed 5000ppm, the display will show H1 and emit a continuous beep. The device must be turned off and restarted to continue operation.Note: S8601 uses a semiconductor sensor. Product design, color, or appearance may vary slightly due to ongoing updates. Please consider this before ordering if specific color or appearance is required.Material: Plastic Color: Black + Red Package Contents: 1 x CO2 Detector Note: The package includes only the items listed above. Other accessories are not included. Lighting and display differences may cause slight variations in the color shown in images compared to the actual product. Measurement error allowance is 1-3cm.