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11. Probe Replacement
11.1 Twist off the probe ring, unplug the probe, plug in new probe (pay attention to probe’s
position), and twist on the probe ring.
11.2 The model numbers of replacement probes that are compatible with the tester are:
PH60-E (Regular pH glass bulb probe)
PH60S-E (Spear pH probe for solids/semi-solids pH testing)
PH60F-E (Flat pH probe for surface pH testing)
ORP60-E (ORP probe)