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Meters & Solutions

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 pH Test Kit
(Wide Spectrum) Measures 3-10 pH. The Hydroponic pH test kit is good for 150 tests. At the rate of ..
$5.95
 pH Tester Sensor Replacement for pH tester 10, 20, 30
Expand the lifetime of your Oakton pH tester by keeping these replacemen sensors on hand. These pH t..
$98.95
 pHTester 10 -- .1 pH Accuracy *ATC (Automatic Temperat
Optimize nutrient strength during growth, flowering, and fruiting by knowing exactly what is going o..
$133.95
1000ppm Calibration Solution
NaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated f..
$6.50
12.880ms/cm Conductivity Solution
M10030B calibration solution is formulated at 12.880ms/cm, and is available in a box of 25@20 ml sac..
$1.00
12880 S/ cm conductivity solution
This Hanna conductivity calibration solution is widely used to assure the proper performance of cond..
$12.95
12880mS/cm Calib Sol 20ml
Hanna Instruments' calibration solution, ideal for gardening, laboratory work, and field experiments..
$1.28
1382 PPM Solution 220ml
Available in 220ml bottles and 20ml sachets. Traditional buffer solutions are packed in 220ml leak-p..
$10.95
1382ppm Solution, 230ml
The conductivity solutions are made of high quality potassium chloride with different strengths. The..
$14.95
1382ppm TDS Sol, 460ml
Hanna Instruments' testing solution, ideal for gardening, laboratory work, and field experiments, co..
$18.95
1382PPM@25c Calibration Solution
Hanna Instruments' calibration solution, ideal for gardening, laboratory work, and field experiments..
$1.28
1413 US Solution 500 ml
Standards have KCl, NaCl and 442 conversions printed on the bottle for ease of use. Temperature corr..
$16.95
1413mS/cm Calibration Sol. 25x
Hanna Instruments' calibration solution, ideal for gardening, laboratory work, and field experiments..
$1.28
1413mS/cm Sol. 230mL
All Hanna solution bottles come with a pH Vs. temperature chart together with the production lot # a..
$14.95
1500 ppm Calibration Solution   8 oz
General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use o..
$8.20
1500 ppm Calibration Solution 1 qt
General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use o..
$21.50
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