Accurate Multi-Parameter Testing: Simultaneously measure three key water quality parameters: conductivity, TDS, and temperature. Understand water purity (TDS), ion activity (conductivity), or the impact of temperature on water quality, all with one device. Perfect for quickly checking if drinking water meets safety standards. Large High-Definition Display: The expansive LCD screen clearly presents test results, ensuring easy readability even in low-light conditions. Designed for all users, including seniors and those with visual impairments, to easily interpret water quality data without misinterpretation. Convenient Unit Switching: Effortlessly switch between different units for displaying test results based on your needs and preferences. For example, TDS values can be displayed in ppm or mg/L, facilitating comparisons with various standards or other testing equipment. Wide Range of Applicable Scenarios: Suitable for water quality testing in diverse settings, from daily monitoring of household drinking water to testing aquarium water, pool water, and communal water sources. Ideal for aquarium enthusiasts to maintain optimal fish habitats and for health-conscious families to ensure safe drinking water. Portable and Easy to Use: Its compact design makes it perfect for on-the-go testing, whether you're traveling, camping, at the office, or school. Simply immerse the pen in water for rapid results, no complex procedures or professional knowledge required.