Ocean Optics LPC-500CM - Manual (Page 11)

1: Setup
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Pressure and Flow Rate
The applied pressure and fluid flow rate through the LWCC obeys the Hagen-Poiseuille relationship.
Flow is proportional to pressure and to the fourth power of the diameter of the fluid capillary, as well as
reciprocal to the length of the capillary and fluid viscosity. A one-meter length of 550 µm ID waveguide
requires approximately 1.5 PSI for water flow of 1 mL/min.
Mechanical Properties
Maximum hydrostatic pressure that the LWCC can withstand has not yet been determined. It has been
operated at 100 to 200 PSI without observed malfunction (a silica capillary with a similar structure has
been reported to withstand pressures of at least 2000 PSI).
Light Throughput of Fiber Optic Cables
The graph below compare three different fiber optic cables (400μm, 500μm and 600μm) used with the
LWCC. The 500 and 600μm fibers are recommended to obtain maximum light throughput on the LWCC.
While the 400μm fibers are compatible with an LWCC, you can expect an approximate 50% decrease in
light throughput.