TDS value: represents the total content of water-soluble substances, such as calcium, magnesium ions, and some trace elements.Large LCD display screen, waterproof design, easy to observe TDS value (cannot detect the pH value or a certain value of dissolved substances in the solution)More accurate and fast: Titanium alloy testing probe, measurement value is not affected by magnetic field in water, measurement value is more accurateEnergy saving and durable: Long usage time, no need for frequent battery replacement, normal use for two years (1.5V * 2 button battery)characteristicLow power consumption, automatic shutdown.Used for swimming pools, water plant laboratories, disease control centers, aquaculture, hospitalsTitanium alloy testing probe, measurement value not affected by magnetic field in waterThe unique temperature compensation function can automatically convert TDS values to a water temperature of 25specificationsNet weight: 28 gramsError range: 2%Battery: 1.5V * 2 (button battery)Battery life: 14.2 * 2.3 * 1.3 (cm)Measurement range: 1-990 PPM (999PPM or more automatic * 10)warningAvoid impact, weight, and fallingAvoid heating and exposure to direct light