ZoBell’s Solution, ORP Standard, APHA for ORP – PT – Z-65

Specifications:

ORP values of Pt Electrode vs various reference electrodes at 25°C in Standard Solutions:

Calomel (Hg/Hg₂Cl₂)…………………………….+ 183mV

Silver/Silver Chloride (1.0M KCl)………….. + 192mV

Silver/Silver Chloride (4.0M KCl)…………..+ 228mV

Silver/Silver Chloride (Saturated KCl)…… + 229mV

Standard Hydrogen …………………………….. + 428mV