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. In everyday environments including kindergartens, schools, office buildings, shopping malls, supermarkets, train stations, hospitals, and other public spaces, 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 Celsius and Fahrenheit - HOLD function to freeze measurement readings - Two-line LCD display showing CO2 levels, 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 instrument has a measuring range of 400–5000 ppm. If CO2 levels exceed 5000 ppm, the display will show H1 and emit a continuous beep. The device must be powered off and restarted before further measurements can be taken. Note: S8601 uses a semiconductor sensor. Material: Plastic Color: Black + Red Package Contents: 1 x Detector The package includes only the items listed above; other accessories are not included. Note: Lighting effects and differences in display screens may cause slight variations in the color of the product shown in images compared to the actual item. Measurement error tolerance is +/- 1–3 cm. Product design, appearance, or color may vary slightly due to ongoing updates. Please consider this before placing your order if specific color or appearance details are important to you.