Table 1 measurements of the distributions in droplet volume measured over a 45 minute period showing the improvement in monodispersity when using acive feedback to control droplet production.

From: Image-based closed-loop feedback for highly mono-dispersed microdroplet production

  Coefficient of Variation Fraction of droplets within percentage of mean volume
5% 1% 0.50%
Stepper motor syringe 10.98% 41% 9% 4%
Pulseless syringe 5.42% 97% 30% 17%
Pressure 3.78% 82% 13% 6%
Feedback 0.32% 100% 99.70% 88%
Frequency feedback 0.40% 100% 98.60% 80%