Syringe pumps are used to deliver precise amounts of fluid at specific time intervals. There are two main types of products: infusion pumps and withdrawal pumps. Infusion pumps are used to administer relatively small amounts of fluids at high, but controlled pressures. Withdrawal pumps are used to remove fluid samples automatically, typically in medical or pharmaceutical applications. Specifications for both types of syringe pumps include minimum and maximum discharge flow, syringe size, number of pumps per assembly, minimum and maximum step rate, accuracy, reproducibility, physical dimensions and weight. Power sources, applications, features, media, and certifications are additional considerations.