An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. It is commonly used in hydroponics, aquaculture and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.
![Milwaukee CD-611 [CD611] Conductivity Economical Pocket Tester](image/cache/wp/gj/Products/Milwaukee_CD611-200x200.webp "Milwaukee CD-611 [CD611] Conductivity Economical Pocket Tester")
![Milwaukee MW804 [MW804] pH / Conductivity / TDS / Temperature Testers](image/cache/wp/gj/Products/Milwaukee_MW804-200x200.webp "Milwaukee MW804 [MW804] pH / Conductivity / TDS / Temperature Testers")
![Oakton/Eutech ECOTestr EC [WD-35462-30] Portable Low-Cost Waterproof Tester](image/cache/wp/gj/Products/Oakton_ECOTerstr-LOW-200x200.webp "Oakton/Eutech ECOTestr EC [WD-35462-30] Portable Low-Cost Waterproof Tester")
![Oakton/Eutech ECOTestr EC [WD-35462-35] Portable High-Cost Waterproof Tester](image/cache/wp/gj/Products/Oakton_ECOTerstr-HIGH-200x200.webp "Oakton/Eutech ECOTestr EC [WD-35462-35] Portable High-Cost Waterproof Tester")
![Milwaukee MW803 [MW803] pH / Conductivity / TDS / Temperature Testers](image/cache/wp/gj/Products/Milwaukee_MW803-200x200.webp "Milwaukee MW803 [MW803] pH / Conductivity / TDS / Temperature Testers")
![Milwaukee EC60 [EC60] Pocket-Size Conductivity / TDS / Temperature Meter](image/cache/wp/gj/Products/Milwaukee_EC60-200x200.webp "Milwaukee EC60 [EC60] Pocket-Size Conductivity / TDS / Temperature Meter")
![Milwaukee EC59 [EC59] Pocket-Size Conductivity / TDS / Temperature Meter](image/cache/wp/gj/Products/Milwaukee_EC59-200x200.webp "Milwaukee EC59 [EC59] Pocket-Size Conductivity / TDS / Temperature Meter")
![HANNA DiST 5 HI98311 [HI-98311] EC/TDS/Temperature Tester](image/cache/wp/gj/Products/Hanna_HI98311-200x200.webp "HANNA DiST 5 HI98311 [HI-98311] EC/TDS/Temperature Tester")
![HANNA Instruments DiST 4 HI-98304 [HI98304] Waterproof EC Tester (0.00-20.00 mS/cm)](image/cache/wp/gj/Products/Hanna_HI98304-200x200.webp "HANNA Instruments DiST 4 HI-98304 [HI98304] Waterproof EC Tester (0.00-20.00 mS/cm)")
![HANNA PWT HI98308 [HI-98308] Pure Water Tester](image/cache/wp/gj/Products/Hanna_HI98308-200x200.webp "HANNA PWT HI98308 [HI-98308] Pure Water Tester")
![HANNA Instruments DiST 6 HI-98312 [HI98312] EC / TDS / Temperature Tester](image/cache/wp/gj/Products/Hanna_HI98312-200x200.webp "HANNA Instruments DiST 6 HI-98312 [HI98312] EC / TDS / Temperature Tester")
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