14 MW150 & MW151 Bench Meters
5. PROBE DESCRIPTION
MA917B/1 for pH measurement.
y Double junction design, reduces risk of clogging with the reference cell physically
separated from the intermediate electrolyte.
y Refillable, with MA9011 3.5M KCl. This solution is silver free. Silver can cause silver
precipitate to form at the junction resulting in clogging. Clogging causes erratic and
slow readings. The ability to refill the electrolyte also extends the life of the electrode.
y Glass body, is easily cleaned and resistant to chemicals.
y Round tip, provides the largest possible surface area for faster readings and is well
suited to testing liquid samples.
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1. Reference wire
2. Inner reference junction
3. Sensing wire
4. Reference refill cap
5. Outer reference junction
6. Glass bulb
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