Performing a simple maintenance check on the electrode before each use can bring peace of mind on reliability.

Don’t forget to check the electrolyte level before usage for correct electrode function ability. It will encourage maximum performance of the electrode by guaranteeing adequate head pressure to keep the liquid junction flowing.

If the level is low, select the proper electrolyte solution compatible with the electrode and top up as required. Some electrolyte solutions are available in US Food and Drug Administration (FDA) compliant bottles. (Scroll down for more information).

Hanna Instruments-8082 Electrolyte Solution for double-junction electrodes 3.5M KCI (FDA 30 ml x 4)

Hanna Instruments-8082 is a 3.5M Potassium Chloride solution designed to refill the electrolyte solution of double junction electrodes. Available in a US Food and Drugs Administration (FDA) accredited bottle.

Double junction pH and ORP electrodes will require the 3.5M Potassium Chloride refill (Hanna Instruments-7082), because it has two chambers. The inner chamber has the Ag/AgCL reference wire with a fill solution of KCl plus AgCl, while the outer chamber has a KCl fill solution providing a Silver-free solution. This is important as Silver can precipitate easily in the presence of heavy metals and block the outer reference junction resulting in a longer response time and poor performance.

Top-up your double junction electrode as required.

• Silver free to eliminate silver precipitation.

See the Hanna range (various sizes available):

• Hanna Instruments-7071 Electrolyte Solution 3.5M KCl + AgCl


• Hanna Instruments-7072 Electrolyte Solution 1M KNO₃


• Hanna Instruments-7075 Electrolyte Solution 1.7M KNO₃ 0.7M KCl


• Hanna Instruments-7076 Electrolyte Solution 1.0M NaCl


• Hanna Instruments-7078 Electrolyte Solution 0.5 (NH₄ )₂ SO₄


• Hanna Instruments-7082 Electrolyte Solution 3.5M KCl

Hanna Instruments-8071 Electrolyte solution, 3.5M KCI +AgCl, Hanna Instruments-8082 Electrolyte Solution 3.5M KCI, and Hanna Instruments-8093 Electrolyte Solution 1M KCI + AgCl are available in 30ml x4 bottles, US Food and Drugs Administration (FDA) approved.

Useful information:

Hanna electrolyte fill solutions are made using high quality reagent-grade chemicals and are manufactured to the highest standards for precision and accuracy.