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Chapter 4 - PROBE INSTALLATION
SENSOR DESCRIPTIONS
HI7698194‑0 Combination pH sensor features a glass pH sensitive
bulb and a silver/silver chloride double junction reference with gelled
electrolyte.
HI7698194‑1 Combination pH/ORP sensor features a glass sensitive
bulb for pH readings, a platinum sensor for redox measurements and
a silver/silver chloride double junction reference with gelled electrolyte.
Note: See page 18 for pH preparation.
See page 18 for ORP activation.
HI7698194‑2 Galvanic dissolved oxygen (D.O.) sensor. The thin gas
permeable membrane isolates the sensor elements from the testing
solution but allows oxygen to pass through. The oxygen that passes
through the membrane is reduced at the cathode and causes a current,
from which the oxygen concentration is determined. The D.O. sensor
conforms to Standard Methods 4500‑AG, EPA 360.1.
Note: The D.O. sensor needs to be activated before installation.
See page 18 for details.
HI7698194‑3 four ring‑electrode conductivity (EC/TDS/Resistivity/Sa‑
linity) sensor. The sensor is immune to polarization or surface coatings.
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