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 | HM Digital Handheld TDS Tester Model TDS-3Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hold Function: saves measurements for convenient reading and recording. Auto-off function: the meter shuts...Only $25.91 |
 | HM Digital Aquapro TDS Water Tester Model AP-1Measures total dissolved solids (TDS) and temperature. Automatic Temperature Compensation (ATC) Water-resistant housing Measurement Range: 0-5000 ppm Digital Calibration (push button) Auto-off function, data-hold function and low-battery indicator. Display:...Only $29.76 |
 | BlueLab Soil pH MeterIf you need to measure the pH level of soil, media or substrates, then the Bluelab® Soil pH Meter is just what you need! Our meter can be used by everybody from the home enthusiast to commercial growers. 5 year Bluelab® Guarantee (6 month for probe)....Only $183.75 |
 | BlueLab Soil pH Meter Replacement ProbeBlueLab Soil pH Meter Replacement ProbeOnly $78.75 |
 | Bluelab Grower's Toolbox - Limited EditionBluelab Grower's Toolbox - Limited Edition The Bluelab Grower's Toolbox combines the essential tools you need to easily manage your crop by measuring the pH, conductivity (ppm) and temperature of the nutrient solution. Learn the hydroponics basics...Only $171.42 |
 | NutraDip Tri-Meter PPM/pH/Temp Continuous Monitor *DISCONTINUED*This meter gives you the ability to monitor pH level, Nutrient Levels in PPM and Nutrient Temperature. This continuous monitoring system requires no batteries, just plug it in to an AC wall receptacle and the meter will remain in a calibration mode for...Only $186.60 |
 | Tri-Meter Replacement pH Probe -- 3' CableReplacement probe for the Tri-Meters or the pH Meters. 6 month limited warranty.Only $53.93 |
 | Nutradip CMS pH METERThe Nutradip® CMS (constant monitoring system) pH Meter is the reliable way to measure the acidity or alkalinity in your water. It is a continuous monitoring pH meter with automatic temperature compensation. 2 year limited warranty on meter. 6 month...Only $103.94 |
 | Nutradip CMS PPM MeterThe Nutradip® CMS (constant monitoring system) Nutrient Meter has automatic temperature compensation and measures the TDS ppm/EC in your water. 2 year limited warranty on meter. 6 month limited warranty on the probe. InstructionsOnly $77.94 |