S8606 CO2 detector features a carbon dioxide sensor along with temperature and humidity sensors. The device 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 monitoring. 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 by helping prevent the spread of infectious diseases. 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 levels, temperature, and humidity simultaneously - Backlight color indication: green, yellow, or red based on CO2 levels - Auto power-off function to conserve battery life - Powered by 3 x 1.5V AAA batteries (batteries not included) Important usage notes: - Measurement range: 400–5000 ppm. If CO2 levels exceed 5000 ppm, the device will display "H1" and emit a continuous beep. The unit must be powered off and restarted before further measurements can be taken. - S8601 model uses a semiconductor sensor - Product design, color, or appearance may vary slightly due to ongoing updates. Please note that colors and appearance may differ from images shown. Consider this before placing your order 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 or products shown are not included. Lighting and display differences may cause slight variations in the color of the product as seen on screen compared to the actual item. Measurement may have a tolerance of ±1–3 cm.