Quarternary Tester Roll, 15 foot, case of 10 boxes. Users of quaternary sanitizers are to have on hand a test procedure to show that their solutions have proper concentrations required. Micro Essential Quaternary Tester provides immediate verification of the solution strength. Also detects exhaustion's of solutions that should be replaced.
battery organiser with tester and 10 aa 12 aaa alkaline batteries on USA sites