Portable water quality analyzer with high-definition display screen and manual one-key automatic calibration mode. Features a sealed top design to prevent energy consumption in wet environments. Provides accurate, simple, and quick measurements.Features: Pen cover design for easy portability, durability, and consistent sensitivity. Suitable for home use, hospitals, swimming pools, water treatment plants, laboratories, and aquaculture. High-definition display with large digital readout for clear viewing. Manual one-key automatic calibration ensures accuracy after long storage periods. Sealed top construction prevents performance issues in humid or wet conditions. pH pen equipped with electrode probe, resistant to heat and cold, offering high sensitivity. TDS & EC pen features titanium alloy probe with high hardness, rust resistance, and oxidation resistance.Specifications: Type options: - Single Yellow pH Pen - White TDS Pen & Yellow pH Pen - White TDS Pen & pH Pen - Blue TDS Pen & Yellow pH Pen - Blue TDS Pen & White pH Pen (optional) Measurement parameters: pH, TDS, EC TDS measurement range: 09990 ppm TDS temperature measurement range: 0.180C / 32176F TDS accuracy: 2% TDS battery: 1 CR2032 button cell, 3V 240mAh (included) TDS probe material: Titanium alloy pH measurement range: 014 pH resolution: 0.01 pH accuracy: 0.05 pH battery: 2 LR44 button cells, 3V 240mAh (included) pH probe type: Electrode Package weight: - 106g / 3.74oz - 190g / 6.70oz Package dimensions: - 150 30 20mm / 5.91 1.18 0.79in - 200 110 20mm / 7.87 4.33 0.79in Packing list: 1 pH Test Pen 1 TDS & EC Test Pen 6 Calibration Powder Packets 2 Instruction Manuals