AND FX-i [FX-500i] Standard-Level Precision Balances with External Calibration, 520g x 0.001g - 130mm . The AND Weighing FX-500i Precision Balance, 520g x 0.001g is robust and durable. The FX500i features Compact Super Hybrid Sensor(C-SHS) that makes the scale compact, fast, and precise. The FX500i includes a wide range of modes to meet workflow needs.