This portable blue EC tester delivers precise electrical conductivity, TDS and temperature readings for full water quality monitoring, built with premium titanium alloy electrodes for stable, long-lasting detection. Equipped with automatic temperature compensation, it eliminates reading deviations caused by fluctuating water temperatures, ensuring ±2% high accuracy across a wide 0–9990μS/cm measuring range. The large clear LCD screen supports a handy hold function to lock values for easy recording, plus an auto-shutoff design to conserve battery power during long-time use. Crafted with smooth blue ABS waterproof housing and a detachable protective probe cap, it resists water splashes and simplifies daily cleaning and storage. Compact pen-style sizing enables effortless handheld testing at any site. Widely applied in hydroponic planting, fish tank aquaculture, drinking water filtration systems, laboratory reagent matching and industrial wastewater inspection. Lightweight, low-cost and user-friendly for both household daily checks and professional lab sampling. Each unit comes with a protective storage case for convenient carry and transport.