AND Galaxy HR-A [HR-250A] Standard-Level Analytical Balance, 252g x 0.1mg - 90mm Ø w/ External Calibration. The A&D Weighing Galaxy HR-250A Analytical Balance, 252g x 0.1mg with External Calibration with RS-232C features Compact Super Hybrid Sensor (C-SHS) that enables space saving with fast 2 sec stabilization. The HR250A simple user navigation makes this ideal entry level balance from lab to industrial weighing environments. The HR250AZ removable breeze break allows effortless cleaning of SS pan, spill ring, and base floor.