PH Calibration Solution (PH 4.01) - High Quality Reference Solution for PH, EC, and TDS Meters - 8 Ounces
PH Calibration Solution (PH 4.01) - High Quality Reference Solution for PH, EC, and TDS Meters - 8 OuncesGeneral Hydroponics uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.InstructionsPour an adequate quantity of reference solution into a clean container. Immerse the pH electrode in pH reference solution for 1 minute before calibrating. To extend the life of your pH meter, keep electrode immersed in a small cup of pH reference solution when the meter is turned off. Rinse the electrode with distilled water after each pH reading to avoid contamination of the storage reference solution. Replace storage solution often. Never pour used solution back into this bottle.About General HydroponicsA leading innovator in the field of hydroponics with factories in North America and Europe. General Hydroponics was founded over 35 years ago, by Lawrence Brooke. Lawrence's inspiration for his first hydroponic system was a mountain stream and the plants thriving beside it. Lawrence forged relationships with renowned botanists and chemists while attending UC Berkeley in the 1970's and it was in those early years of his research that General Hydroponics' legendary pH stability was developed. This system was prototyped and General Hydroponics began.General Hydroponics is proud of its tradition of bringing nature and technology together. GH will always continue to strive for quality, simplicity, innovation, and a sustainable future.