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PPM

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VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified from $13.29 ($13.29 / 100 g)	HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc. $13.96 from $12.80
2024 Upgraded TDS Meter Digital Water Tester, DUMSAMKER Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More from $13.96	Hofun TDS Meter, 3 in 1 TDS, EC & Temperature Meter, Accurate & Reliable PPM Meter, Digital Water Testing kits for Drinking Water Quality, Tap, Well, Swimming Pool, Aquarium, RO/DI System, Hydroponics from $9.99
Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow $88.67 from $79.55	2024 Newest TDS Meter Digital Water Tester, Lxuemlu Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More from $9.97
PH Meter, TDS PPM Meter, Soil PH Tester, PH/EC Digital Kit, 3 Pack from $21.99	HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy $26.00 from $25.99
Craft911 SAFEWATR™ TDS Meter Digital Water Tester - 3 in 1 Accurate Fast TDS, EC, PPM Meter 0-9990 \| Water Quality Tester - TDS Water Tester for Drinking, Hydroponics, Aquarium from $11.99	TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 \| Easy to Use Water Quality Tester \| Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (Green) from $12.99