If you are having a problem with one of our instruments, please complete the following information and send to us. Your Name Title or Dept. If bubbles or spots appear on the lens of the instrument, moisture may have gotten inside the refractometer. Refractometers should not be held under running water to clean or dipped into a sample to obtain a reading. Most pH electrodes must be kept moist and clean.
Harsh solutions can shorten the life of a pH electrode.
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