Brief Introduction
Apera Instruments 201-C pH Electrode is featured with a proprietary lithium glass membrane for fast
and stable readings. The gel inner reference solution does not need to be refilled. This electrode is
designed for testing in general water solutions. The electrode may NOT work well in the following
situations:
1. Long-term testing in high temperature solutions (>122°F or 50°C)
2. Frequent testing in strong alkaline (>12 pH) or acid (<2 pH) solutions
3. Testing low ionic strength solutions like distilled or deionized water
4. Testing caustic solutions that will corrode the polycarbonate housing of the electrode
Technical Specifications
How to Install the Electrode
1. Find the BNC socket (where it shows pH ORP) on the pH meter; Open the rubber cap; Insert the
blue BNC connector of the electrode to the BNC socket while twisting clockwise until it’s locked.
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