TDS METER Pen Type Water Purity Quality Tester PPM Testing Machine TDS-3 Digital TDS Meter
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DS stands for Total Dissolved Solids, which are the inorganic salts and organic matter in a liquid. This includes calcium, magnesium, sodium, etc. Do not immerse meter in liquid beyond the maximum immersion level of 4 cm. Do not store meter in high temperatures or in direct sunlight.
