YSI ProDSS - ISE Sensor Short-Term Storage (less than 4 weeks); ISE Sensor Long-Term Storage

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Maintenance and storage
pH - pH/ORP sensor storage
The pH - pH/ORP sensors are shipped with their tips in a storage bottle containing KCl. Store the pH - pH/ORP sensors
in the shipping container when not in use.
Figure 71 pH - pH/ORP short-term
storage
pH - pH/ORP sensor short-term
storage (less than 4 weeks)
When in regular field use, the pH-pH/ORP sensors should remain
installed on the bulkhead. Place approximately 0.5 in (1 cm) of any water
(tap or environmental) in the calibration cup (Figure 71).
Install the calibration cup onto the bulkhead and firmly tighten to prevent
evaporation.
Figure 72 pH - pH/ORP long-term
storage
pH - pH/ORP sensor long-term storage
Remove the sensor from the bulkhead and insert the sensing end into
the shipping bottle. Install the bottle o-ring and tighten (Figure 72).
The shipping bottle contains a 2 molar solution of pH 4 buffer. If this
solution is not available, store the sensor in tap water.
NOTICE: To prevent damage, do not store the pH - pH/ORP
sensors in Zobell solution or DI water.