S8601A CO2 detector features a carbon dioxide sensor along with temperature and humidity sensors. This instrument measures 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 work safety. In everyday environments like kindergartens, schools, offices, shopping malls, supermarkets, 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. 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 indicators in green, yellow, and red for easy status recognition - Auto power-off function to conserve battery life - Powered by 3 x 1.5V AAA batteries (not included) Note: - Measurement range: 400–5000 ppm - If CO2 levels exceed 5000 ppm, the display will show H1 and emit a continuous beep. The device must be turned off and restarted before further testing. - Utilizes an infrared sensor for improved sensitivity and accuracy in CO2 measurement Product design and color may vary slightly from the image due to ongoing updates. Appearance and color may differ without prior notice. Please consider this before ordering if specific appearance or color is required. Material: Plastic Color: Black + Red Package Contents: 1 x CO2 Detector Note: Other items not included.