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Pressure-activated
• OMRI Listed and Compliant for use in organic farming
Emits a clean
Three different non-linear EC-to-TDS conversion factors (KCl
Great for people with limited space or anyone trying to make the most of any vertical space
Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 tents-/-indoor-greenhouses Pressure-activatedHanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS NIST primary standard buffer solutions. The 20 ml sachets are ideal for infrequent calibrations while for heavy duty applications, you can choose from the popular 230 ml, 1 liter, or 1 gallon containers. Now the pH 4 buffers carry lot #, expiry date as well as pH C chart on every bottle. HI 7004L C and HI 8004L C are also supplied
