Hanna Instruments HI 7635 Instruction Manual

Instruction Manual

HI 7635 - HI 7636
4-PIN IN-LINE
CONDUCTIVITY PROBES
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Dear Customer,
Thank you for choosing a Hanna product.
This manual will provide you with the necessary information
for the correct use of the probe. Please read it carefully
before installing the probe.
If you need additional technical information, do not hesitate
to e-mail us at tech@hannainst.com.
Hanna Instruments reserves the right to modify the design, construction and
appearance of its products without advance notice.

GENERAL DESCRIPTION

HI 7635 and HI 7636 are one-piece-molded conductivity
probes with pipe threads (1" NPT) at both ends.
This allows the probes to attach to an in-line system, and to
be used in conjunction with the HI 8936 conductivity
transmitters.
Measurements are highly accurate, and performed by using
a 4-ring potentiometric measuring method.
Probes require very little maintenance; the construction of
the housing is rugged, fiber-reinforced polypropylene.
HI 7635 also incorporates a built-in NTC sensor for tempera-
ture compensated conductivity measurements.
The max working pressure of these units is 5 bar (72.5 psi).
Do not use in systems where the temperature exceeds
80°C (176°F).

INSTALLATION

For the installation of the in-line conductivity probes, it is
necessary to use rubber seals between the probe and the
pipe or elbow joints. A pipe sealant is also recommended to
ensure a leak free joint. When screwing the joints, take care
not to overtighten as excessive pressures can cause the probe
damage.
TYPICAL IN-LINE ASSEMBLY FOR HI 7635 (or HI 7636).