Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 tents-/-indoor-greenhouses The dispenser also has three

The dispenser also has three programmable spray intervals

• OMRI Listed and Compliant for use in organic farming

Run at 100%

Three different non-linear EC-to-TDS conversion factors (KCl

Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 tents-/-indoor-greenhouses The dispenser also has threeHanna'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