Meters & Solutions

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1413mS/cm Sol. 230mL

All Hanna solution bottles come with a pH Vs. temperature chart together with the production lot # a..

$16.99

1500 ppm Calibration Solution 1 qt

General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use o..

$21.50

1500 ppm Calibration Solution 8 oz

General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use o..

$8.20

1500 ppm Packet, case of 25

This item is sachets Available in 220 ml bottles and 20 ml sachets. Traditional buffer solutions are..

$25.99

1500 PPM@25C Calibration Solution 20mL, case of 25

Hanna Instruments' calibration solution, ideal for gardening, laboratory work, and field experiments..

$36.99

1500PPM Solution, 230ml

Hanna Instruments' solution, ideal for gardening, laboratory work, and field experiments. Comes in a..

$15.99

1500PPM TDS Sol 16oz

Hanna Instruments' calibration solution, ideal for gardening, laboratory work, and field experiments..

$19.99

20 ml pack of 1000 ppm NaCl Calibration Solution

For optimal performance, re-calibrate your meters periodically with a 20 ml pack of 1000ppm calibrat..

$25.00

20 ml pack of pH 4 Buffer solution (20/cs)

20 ml of pH 4 buffer solution will help you calibrate your probe down to the range of you plant...

$25.00