LS311 Digital Multi-Parameter Water Quality Tester Portable Water Analyzer COD TOC UV275 TDS EC SAL GH S.G. Temperature Meter

Linshang LS311 is a multi-parameter water quality tester designed for household drinking water such as tap water, purified water, and groundwater. It is also suitable for seawater and aquaculture salinity testing.The device uses UV absorbance to measure COD, TOC and UV275, and uses electrical conductivity to calculate TDS, electrical conductivity (EC), salinity (SAL), general hardness (GH) and specific gravity (S.G.). Linshang LS311 provides intelligent water-quality scoring, with backlight colors indicating four grades: Excellent, Good, Fair, and Poor. It also features automatic temperature compensation to ensure consistent repeatability and accuracy across different environments.

• Simple operation—just press once to quickly determine whether the water meets national drinking-water safety standards.
• The display automatically changes its backlight color according to the water-quality rating: Excellent, Good, Average, or Poor. The interface is intuitive and easy to understand.
• By measuring electrical conductivity, LS311 accurately calculates salinity, general hardness, and specific gravity, helping users gain a complete understanding of the water’s condition.
• The instrument measures: SAL (salinity), GH (general hardness), S.G. (specific gravity), COD (chemical oxygen demand), TOC (total organic carbon), TDS (total dissolved solids), UV275 (ultraviolet absorption value), EC (electrical conductivity), Temperature — providing a full evaluation of water quality.
• LS311 evaluates multiple parameters to give a more accurate and comprehensive rating for mineral and drinking water. A TDS pen alone can be misleading.
• Automatic temperature compensation ensures repeatability and accuracy across different environments, with long calibration intervals.