Solutions for storage and cleaning that prolong the working life of pH electrodes. Cleaning solutions are identified by the letters A, B, C, and D; each letter designates a unique formulation.

• Cleaning solution A: for removing protein contaminants
• Cleaning solution B: for removing bacterial contaminants
• Cleaning solution C: for general cleaning
• Cleaning solution D: for removing oil and grease contaminants

Bottles include a small beaker to hold the solution and a plastic pipette to remove the old electrode filling solution.

Storage solution ensures that the pH electrode works properly after prolonged storage, overnight storage and between samples.