1. Metering System Inc 2324 Davidsonville Rd, Gambrills, MD 21054 Coordinate: 38.99443,-76.67218 Phone: (301) 858-0354
2. Metering Systems Inc 1201 Defense Hwy, Gambrills, MD 21054 Coordinate: 38.98925,-76.65445 Phone: (410) 451-7501