Our pH probes last for approximately 1 year. That lifetime is caused by a liquid inside the probe that runs out over time and cannot be replaced.
To maximize the length of time your probe lasts for, you can follow our pH Probe Care instructions.
Every 3 months (or as often as possible), we recommend that you calibrate your pH Probe using our Calibration kit.
Every year, once it's time to replace the probe, you can easily order a new one.