HI-7082 is a 3.5M Potassium Chloride solution designed to refill the electrolyte solution of double junction electrodes.
Double junction pH and ORP electrodes will require the 3.5M Potassium Chloride...
HI-7072 is a 1M Potassium Nitrate (KNO3) electrode fill solution available in a 4 x 30ml bottles, specifically for use in double junction and ion selective electrodes.
The solution is Chloride free...