Diarrhea-induced dehydration is the second leading cause of death in children under five years old. Patients with diarrhea as well as malaria and dengue fever are at risk for dehydration. Combined, these conditions are responsible for the deaths of up to 1.4 million children under five years of age annually. Severe cases of dehydration are treated with IV fluid therapy. However, one risk of IV therapy in low-resource settings is over-hydration, particularly for babies and young children who require low volumes of fluid. Over-hydration can lead to complications and death. Due to the risk of over-hydration, the World Health Organization recommends that children who are severely dehydrated are given rapid IV therapy only with close monitoring. However, it is difficult to ensure that patients are constantly monitored to stop fluid administration at the appropriate time due to a limited availability of trained staff. In developed countries, infusion or elastomeric pumps and burettes are commonly used to regulate delivery of IV therapy to pediatric patients; but these are too costly and not appropriate for many developing world healthcare settings. These approaches are costly, require routine maintenance, consumables that are not generally available in the developing world, and electrical power that may not be reliable.