Features: It can quickly and accurately detect the concentration of gases such as ammonia, provide gas monitoring data, and ensure the safe of the usage environment. High sensitivity: Equipped with highly sensitive sensors, it can respond to changes in the concentration of gases such as ammonia, helping users effectively prevent potential hazards. In a humid, warm environment, ammonia gas is produced faster.Therefore, while detecting ammonia gas, you should also keepings track of the temperature and humidity. It can display gas concentration values and alarm, with sound and light alarm functions, and remind users to pays attention to gas exceeding standards. Lightweight and convenient: The small size and lightweight designs is easy to carry and operate, suitable for gas detection needs in various occasion. Specifications: Material:ABS Measuring Ranges: 0~100PPM Resolution: 0.1PPM Temperature: -9~55℃ Humidity:0-100% Battery:2500mAh Package Includes: 1Piece Ammonia Meter note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.