Figure 8
From: Improving accuracy of cell and chromophore concentration measurements using optical density
A short path-length optical density flow cell for bioreactor monitoring. A flow cell spectrophotometer machined from an acrylic block to accommodate an LED light source on one side of the culture flow slit, and a photodiode on the other. L.T.R.: Front view where the photodiode senses light; side view showing the LED position relative to the flow path; flow cell implemented for monitoring of E. coli culture.