The Ph/Tds/Ec meter is a multi - functional water quality testing instrument that can simultaneously measure the acidity - alkalinity (Ph value), electrical conductivity, and total dissolved solids content of water bodies. It is equipped with high - precision sensors. The Ph sensor can accurately sense the acid - base degree of water bodies, the electrical conductivity sensor can quickly measure the electrical conductivity of ions in water, and the total dissolved solids sensor can accurately obtain the total amount of various solid substances dissolved in water. The outer shell is generally made of sturdy and durable plastic materials with good water - proof and impact - resistant properties, making it convenient to carry to different testing sites. Its advantage lies in its high degree of functional integration. A single measurement can obtain multiple key water quality parameters, providing comprehensive and accurate data support for water quality assessment. It is widely used in drinking water testing to ensure that residents' drinking water meets safety standards; in swimming pool water quality management to monitor the water quality status in real time and safeguard the health of swimmers; in the field of agricultural irrigation to help farmers understand the quality of irrigation water and reasonably adjust irrigation strategies.