Tds water tester meter

Tds test meter, batteries supplied. Tds test meter for testing water. Measures ppm in water content + temperature. TDS means tatal dissolved solids, impurities in the water, the larger the TDS value, indicating the content of impurities in the water, on the other hand, the content of impurities is low. Overall conversion rate between GH value and TDS of water hardness: 0-89ppm(s), strong soft water 0-4DH, 90-159ppm, soft 5-8dh, 160-229ppm 9-12dh, moderately HARD WATER, 230-339ppm, medium hard 13-18dh, 340-534ppm, water 19-30dh, over 535ppm, strong hard water above 30dh.