{"ind_slp": "CC_ind_slp", "therm": "PD938", "light": "PD357", "ea434": "CC_ea434", "eb434": "CC_eb434", "psal": "dpi_PRACSAL_L2", "ea578": "CC_ea578", "ind_off": "CC_ind_off", "ref": "PD933", "eb578": "CC_eb578"}
pH is a measurement of the concentration of hydrogen ions in a solution. pH ranges from acidic to basic on a scale from 0 to 14 with 7 being neutral.