Clean the liquid junction of your electrodes once a day or at least once a week to prevent clogging and to maintain accuracy. Immerse the electrode in the proper cleaning solution for about 5 minutes.
HANNA® offers a wide range of cleaning solutions, for general purpose and specific applications, to eliminate all kind of dirt or deposit from the electrode, and thus ensure correct measurements.
Calibration Standard HI 701 Checker HC ®
HI38061 CTK Phosphate
HI98128 pH/°C-Tester (0.01 pH resolution) - waterproof
HI76302W Four ring Conductivity probe with internal temperature sensor
เครื่องวัดปริมาณฟอสฟอรัส ช่วงต่ำมาก รุ่น HI736 

