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	Hanna Primo TDS Tester The Primo TDS tester provides a fast and dependable way to measure the Total Dissolved Solids in your water samples. It is ideally suited for the rigorous demands of water quality professionals, who will appreciate the practicality of Primo's easy-to-read... Only $38.98
	Hanna PHEP Tester (Model HI 98107) The HI 98107 (pHep®), which is the result of over two decades of research and manufacturing experience, is the updated version of our widely popular 96107 (pHep®). Today the redesigned pHep series feature a rugged and ergonomically enhanced casing... Only $46.64
	Hanna pH4 Calibration Solutions -- 16 oz HANNA®' buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards. All pH 4 solutions show batch number, expiration date and the correlation table between pH and... Only $16.71
	Hanna pH7 Calibration Solutions -- 16 oz HANNA®' buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards. All pH 4 solutions show batch number, expiration date and the correlation table between pH and... Only $17.08
	Hanna 1500PPM Calibration Solution TDS solution are produced with high-quality potassium chloride in various concentrations. They are standardized using a conductivity meter calibrated with NIST potassium chloride. The 1413 ?S/cm solution is the one best suited for general use. This solution... Only $18.20
	Hanna 1413 uS-CM Calibration Solution -- 16 oz TDS solution are produced with high-quality potassium chloride in various concentrations. They are standardized using a conductivity meter calibrated with NIST potassium chloride. The 1413 ?S/cm solution is the one best suited for general use. This solution... Only $18.20
	Hanna Grochek TDS Monitor Model HI983301N These state-of-the-art meters have been engineered with a host of features suited to the aggressive environments commonly found in agricultural applications; housings and cable connections have been sealed against vapor and humidity. With a 12 volt DC... Only $86.19
	Rapitest Digital Moisture Meter by Luster Leaf The Rapitest Digital Moisture Meter model #1825 tests for moisture at the roots - where it matters - you no longer risk over watering a healthy plant just because the soil near the surface is dry or under-watering because it appears moist. Ideal for houseplants,... Only $10.53
	Rapitest Digital Soil PH Meter Model 1845 by Luster Leaf Plants need the correct pH level which controls how well plants utilize the nutrients available in your soil. All plants have a pH preference, so it is important to know the pH level of your soil. You can choose plants with the same pH preferences, avoid... Only $11.93