EM Series handheld and in-line meters are designed to last – from small service centers and lubrication trucks to heavy-duty repair facilities. Choose from 8 or 20 gpm (30. 3 to 75. 7 lpm) hand-held models or our 20 gpm (75. 7 lpm) in-line meter. Graco's EM Series meters are backed by our robust and feature upgraded electronics and easy-to-read LCD with simple operator controls that measures in quarts, gallons, pints and liters.