5-in-1 Multifunctional DesignAccurately measures pH,EC (Electrical Conductivity),TDS (Total Dissolved Solids),Salinity,and Temperature for comprehensive water quality testing. Clear Backlit LCD DisplayEnsures easy reading in low light or nighttime conditions,making it ideal for field testing in all environments. Versatile ApplicationsSuitable for aquaculture,wastewater treatment,water source monitoring,agricultural irrigation,laboratories,and home or commercial farms. Durable ConstructionMade with high-quality materials for long-term use and consistent performance in both indoor and outdoor settings. Advanced Sensor TechnologyFeatures a high-precision external temperature sensor and advanced probe design for automatic temperature compensation and stable readings across various water qualities. Portable and User-FriendlyLightweight,handheld design with simple button controls and intuitive display,suitable for both professionals and beginners. Energy EfficientPowered by 4 LR44 1.5V button batteries with auto-shutdown after 5 minutes of inactivity to conserve energy. Specifications: Model: MF-X51 Range: TDS: Range: 0-9999ppm Resolution: 1ppm Accuracy: 2% EC: Range: 0-9999uS/cm Resolution: 1uS/cm Accuracy: 2% Temperature: 0.1-60/32.1-140F pH: Range: 0.00-14.00pH,Resolution: 0.01pH,Accuracy: 0.05pH SALT: 0.01-25% Battery: 4*1.5V 135mAh LR44 buttonbatteries Dimensions: 118.25*40mm Package included: 1 x Digital Water Quality Tester