Ключевые слова: acid, acidity, alkaline, analysis, base, biology, buffer, calibration, chemical, chemist, chemistry, data, display, education, electrode, equipment, glass, glassware, gloves, instrument, lab, laboratory, liquid, measure, medical, medicine, meter, monitor, ph, ph meter, potential, probe, research, rubber, sample, science, scientific, scientist, screen, solution, temperature, test, water, woman,