Selecting The Sensor Holder - YOKOGAWA DO70G User Manual

2.2.2 Selecting the Sensor Holder
Each holder or fitting where the DO70G Optical Dissolved Oxygen Sensor is assembled has the
following characteristics.
Choose a holder that suits the liquid to be measured and the measurement location.
An appropriate adaptor is required for connection to the holder. Select it with the Holder Option
Code or arrange it separately according to the adaptor listed in Spare Parts.
[PB350G Angled Floating Ball Holder and PB360G Vertical Floating Ball Holder]
The fitting is designed to contain the sensor in a sphere that floats on a liquid. This fitting is
immune to large variations in the liquid level. Since the wet part is smooth and less susceptible to
catching flocs, the sensor does not trap rubbish that mixes in with the SUM (Related description:
See Subsection 3.2.3). The float is supported by an arm and does not move away from the
measurement point even if the SUM is flowing.
When using this holder the membrane damage detector function in the converter can be activated.
Sensor cable
Mounting bracket
Fix the bracket to a nominal 50 A
pipe (OD of 60.5 mm) or a
horizontal surface (floor, the
edge of a solution tank, etc.).
Figure 2.2
<2. Installing the Sensor and Connecting the Cable>>
Arm assembly
Suspension of Dissolved Oxygen Sensor Using PB350G Angled Floating Ball Holder
Pipe assembly
Holder assembly
Guide pipe
Float
Float ball
IM 12J05D04-01E
2-3
(Sensor cable)
Arm bracket
Pulley
Guide roller
Rope
Auxiliary bracket
Balance weight
(Stanchion)
8th Edition : July 11, 2023