IM12B06K02-01E-E
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The model FD20 immersion fittings are used
to submerge sensor tips so that the pH and/
or ORP (redox) potential of liquids in open
vessels, tanks, drains etc. can be measured.
The fittings are available for mounting of
either: - one electrode
- three electrodes
- four electrodes or alternatively three
electrodes and a cleaning system.
1.1 Features
• Designed for either pH or ORP measure-
ments in tanks, open vessels and drains.
• “Hoisting cable” for easy maintenance.
• Pre-selected immersion length.
• Wide choice of construction materials.
• Flange mounting.
• High degree of standardisation reduces
spare holding requirements.
• Liquid earth pin for stable measurements.
• Chemical or brush cleaning systems as
an option.
1.2 Unpacking and Checking
Upon delivery, unpack the fitting carefully
and inspect it to ensure that it is not
damaged during shipment. If damage is
found, retain the original packing material
and immediately notify the carrier and the
relevant local Yokogawa Sales Office.
Make sure the Model Code and Serial
Number on the sensor are the same as on
the packing list. Also check if option(s) that
were ordered, are included and correct.
1.3 Warranty and Service
Yokogawa products are guaranteed free
from defects in workmanship and materials
under normal use and service for a period
of (typically) 12 months from the date of
shipment from the manufacturer. Individual
Sales organizations can deviate from the
typical warranty period, and the conditions
of sale relating to the original purchase order
should be consulted. Damage caused by
wear and tear, inadequate maintenance,
corrosion, or by the effects of chemical
processes is excluded from this warranty
coverage. In the event of a warranty claim,
the defective goods should be sent (freight
paid) to the Service Department of the
relevant Yokogawa Sales office for repair or
replacement (at Yokogawa’s discretion).
The following information must be included in
the letter accompanying the returned goods:
• Model Code and Serial Number.
• Original Purchase Order and Date.
• Length of time in service and description of
the process.
• Description of the fault and circumstances
of the failure.
• Process/environmental conditions that may
be related to the failure of the sensor.
• Statement as to whether warranty or non-
warranty service is requested.
• Complete shipping and billing instructions
for return of material, plus the name and
phone number of a contact person that
can be reached for further information.
• Clean Statement
Returned goods that have been in
contact with process fluids must be
decontaminated and disinfected prior to
shipment. Goods should carry a certificate
to this effect, for the health and safety of
our employees. Material Safety Data sheets
must be included for all components of the
process to which the fitting(options) have
been exposed.
1. Introduction
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