The present paper shows the study on the various syringe pumps and infusion device analyzers which are used in hospitals and research laboratories for precise drug dosing, especially for cancer patients receiving chemotherapy, insulin therapy, pain management and other critical applications. For the calibration of such instruments, the Fluid Flow Metrology Section of the CSIR-National Physical Laboratory (CSIR-NPL), New Delhi, has established a low-liquid flow calibration facility in the flow range of 1 to 1500 mL/h with an expanded uncertainty of 1.0 to 0.30% (at k = 2 for 95% confidence level). From the study of the calibration of the syringe pumps and infusion device analyzers, it is concluded that repeatability in flow measurement, evaporation and resolution of DUT are dominant factors of uncertainty at lower flow. However, for higher flow, the timer uncertainty and repeatability in measurement are dominant factors of uncertainty.