ATI Q46D Dissolved Oxygen System Part 3 – Sensor Mounting
13
O&M Manual
Rev-N (4/21)
3.3 Flowcell Mounting
For applications requiring measurement in a flowing water line, a flowcell assembly and a flow-
type sensor should be used. Two types of flowcell are available. Applications that allow an open
flow system can best be satisfied using the 00-0043 constant-head flowcell. This flowcell is open
to atmosphere and the drain is a gravity drain that must go to waste.
For applications where in-line measurement is required, flowcell no. (00-1522) should be used.
This flowcell allows pressurized sample to flow to the sensor, but provision must be made for
controlling the flow at 300-500 cc/min. Sample pressure can be variable provided pressure
changes are relatively slow. Rapid pressure changes will cause a spike in the measured D.O.
value.
Figure 7 - Constant Head Flowcell Dimensions
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