Optos Electronic Metering Pumps Explore our line of electronic metering pumps with flow rates from 0.002 to 80 mL/min. at pressures to 6000 psi. Optos Electronic Metering Pumps » HP Manual Metering Pumps Explore our line of manual metering pumps with flow rates from .02 to 100 mL/min at pressures to 5000 psi. HP Manual Metering Pumps » VS Variable Speed Metering Pumps Explore our variable speed metering pump with flow rates from 12.0 to 144 mL/min at pressures to 5000 psi. VS Variable Speed Metering Pumps » MicroPro™ Pumping System Explore our line of micro flow pumps. With flow rate ranges from 0.01 μL/min and a wide variety of configurations, they can be used in LC-MS, capillary HPLC, and reactant feed. MicroPro™ Pumping System » Universal Fraction Collector Explore our fraction collector. With various modes of collection and test tube size compatibility, our fraction collector is very versatile. Universal Fraction Collector » Hydrolysis/Derivatization Explore our Hydrolysis/Derivatiation (H/D) WorkStation and spare parts for PicoTag Hydrolysis/Derivatization »