[7 in 1 water quality meter] can measure PH / TDS / EC / ORP / S.G / sea water specific gravity / temperature. The measurement range is large, and it can measure the salinity of fresh water and sea salt. This product can detect the salinity of edible salt. At the same time, it can detect the salinity of seawater. Food salinity measurement range: 0.00-25.00%, sea water salinity measurement range: 10.1-200.0ppt. [Multi-function test]: Portable TDS meter can be carried anywhere to measure water quality, such as tap water, reverse osmosis system water, aquarium, sea water, swimming pool water. [Auto power off function and large screen display] Auto power off function turns off the power after 5 minutes, saving power without any operation. Adopt fully parent liquid crystal (LCD) to display 4-digit value and corresponding physical quantity unit. [Waterproof grade IP67] IP67 is the international waterproof and dustproof certification. Prevent dust intrusion, soak in for a short time. C-600 is the latest multifunctional water quality tester developed in 2020. It has 7 functions and one product can be used for multiple purposes. It can measure PH / TDS / EC / ORP / sea water specific gravity / temperature. The measurement range is large, and it can measure the salinity of fresh water and sea salt. It is an amazing digital water quality monitor for homes, swimming pools, drinking water and aquariums. RCYAGO products walk with you to make life better. Waterproof rating: IP67 Temperature: ATC 0-60° Operating environment: 0-60.0°C (32.0-140°F); relative humidity 100% TDS coefficient: 0.5 Temperature range: 0.1-60.0C 32.0-140° Temperature accuracy: ±0.5 Temperature resolution: 0.1°C /°F Automatic shutdown: 5 minutes Function parameter: PH value: Measuring range: 0.01-14.00pH Resolution: 0.01pH Accuracy: ±0.05pH TDS: Measuring range: 0 to 1000ppm 1000ppm to 10000ppm