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HM DigitalHM Digital is recognised around the world for providing water testing equipment. The TDS (Total Dissolved Solids) meter tests for charge ions, including minerals, salts or metals dissolved in a given volume of water. This is directly related to water purity and is often used for testing aquarium systems as well as reverse osmosis water purification systems.  Price: $29.95 Save: $10.00 (25%) off RRP  Price: $54.95 Save: $44.05 (44%) off RRP  Price: $89.95 Save: $39.05 (30%) off RRP  Price: $84.95 Save: $24.05 (22%) off RRP  Price: $89.95 Save: $25.00 (22%) off RRP  Price: $49.95 Save: $40.00 (44%) off RRP  Price: $99.95 Save: $50.00 (33%) off RRP  Price: $99.95 Save: $50.00 (33%) off RRP  Price: $25.95 Save: $7.05 (21%) off RRP  Price: $25.95 Save: $7.05 (21%) off RRP  Price: $37.00 Save: $4.00 (10%) off RRP  Price: $37.00 Save: $4.00 (10%) off RRP |
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