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. It is also suitable for use in everyday environments including kindergartens, schools, offices, shopping malls, supermarkets, train stations, hospitals, and other public areas. Monitoring CO2 levels helps improve indoor air quality, enhance learning and work efficiency, and support public health and safety. 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, 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 measuring range is 400-5000ppm. If concentrations exceed 5000ppm, the device displays H1 and emits a continuous beep. The unit must be powered off and restarted before further measurements. Note: This model uses a dedicated CO2 sensing technology. Product design, color, or appearance may vary slightly due to updates or manufacturing variations. Please consider this before ordering if specific color or appearance is required. Material: Plastic Color: Black + Red Package Includes: 1 x CO2 Detector Note: Other items not included. Lighting conditions and monitor settings may cause slight color differences between the product image and actual item. Measurement error allowance is +/- 1-3cm.