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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Sens Actuators B Chem. 2013 Oct 11;191:10.1016/j.snb.2013.10.008. doi: 10.1016/j.snb.2013.10.008

Figure 4.

Figure 4

Fluid pressure and volumetric flow rate as a function of time for a constant control pressure. Sensors in the fluid and control lines monitor pressures, and meniscus tracking on the fluid output allows for flow measurement. The flow rate increases rapidly once the fluid pressure exceeds the control pressure at ~240 s.