Hanna Instruments HI 9829 - Manual (Page 19)

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Chapter 4 - PROBE INSTALLATION
HI 7609829
and HI 7629829 multisensor probes are used for the measure-
ments of pH, ORP, conductivity, turbidity, dissolved oxygen, chloride, nitrate-
nitrogen, ammonium-nitrogen and temperature. Each probe can utilize 3
sensors. A description of each sensor follows.
4.1 SENSOR DESCRIPTIONS
HI 7609829-0 Combination pH sensor features a glass
pH sensitive bulb and a silver/silver chloride double junc-
tion reference with gelled electrolyte.
HI 7609829-1
Combination pH/ORP sensor features a
glass sensitive bulb for pH readings, a platinum sensor for
redox measurements and a silver/silver chloride double junc-
tion reference with gelled electrolyte.
Note
Note Note Note Note See section 4.2.1 for pH preparation.
See section 4.2.2 for ORP activation.
HI 7609829-2
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 mem-
brane is reduced at the cathode and causes a current, from
which the oxygen concentration is determined. The D.O. sen-
sor conforms to Standard Methods 4500-AG, EPA 360.1.
Note Note Note Note Note The D.O. sensor needs to be activated before
installation. See section 4.2.3 for details.
HI 7609829-3 4-electrode conductivity sensor. The sensor
is immune to polarization or surface coatings.
The HI 7609829-4 Combination EC/Turbidity sensor. It
includes a 4-electrode conductivity sensor and a turbidity
sensor that conforms to ISO 7027 standards in a single
sensor body. The turbidity sensor uses an optical technique
to measure suspended particles in water.