Summary: The 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, beverage production, energy-saving processes, and underground operations. In everyday environments including kindergartens, schools, offices, shopping malls, supermarkets, train stations, and hospitals, monitoring carbon dioxide 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 selectable between C and F - HOLD function to freeze measurement readings - Two-line LCD display showing CO2, temperature, and humidity simultaneously - Backlight color indicators (green/yellow/red) for quick status recognition - Auto power-off function - Powered by 3 x 1.5V AAA batteries (not included) Note: - Measurement range: 4005000 ppm. If levels exceed 5000 ppm, the device displays "H1" and emits a continuous beep. The unit must be turned off and restarted to resume operation. - S8601 uses a semiconductor sensor. - Product design, color, or appearance may vary slightly due to updates. Please consider this before ordering if specific color or appearance is required. Material: Plastic Color: Black + Red Package Contents: 1 x Detector Note: Other items not included. Lighting and display differences may cause slight color variations between the image and the actual product. Measurement error allowed within +/- 13 cm.