Flow-Cell Kits (Low Pressure) - Hach 2100AN Instrument Manual

SECTION 5,
continued

5.2 Flow-Cell Kits (Low Pressure)

Figure 8 Low Pressure Flow Cell Assembly
* U.S. patent D358,448; other patents pending.
The Low Pressure Flow-Cell systems (manual or automated kits) use an
innovative sample cell design* with a baffled inlet and dual outlets that minimize
accumulation of entrapped air bubbles and heavy solid particles in the cell (see
Figure 8). The glass cell is threaded on both ends to accommodate plastic end
caps. The cell has an approximate volume of 22 mL when assembled. The parts
disassemble easily for thorough cleaning.
Sample is introduced into the top of the cell (see Figure 9). A baffle deflects
the incoming sample to the side wall of the cell minimizing turbulence in the
light path.
Sample is discharged from top and bottom outlets. The top outlet collects and
expels air bubbles and particles that tend to float. The conical-shaped bottom
outlet collects settleable solids; water discharged from the bottom outlet carries
the settled solids out of the cell. This novel, dual-outlet design eliminates dead
volume in the cell to provide rapid, thorough flushing of the cell from one sample
to the next.
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