Adam Core CQT [CQT 251] Portable Compact Balances With External Calibration, 250g x 0.1g. The Core series from Adam Equipment is the best choice for simple operation and economy. The tough durable ABS housing is designed to withstand field and laboratory environments, while being easy to clean and protected from accidental spills. With built-in ShockProtect™ protection Core balances can handle excessive overloads without a problem. Complete with a removable draft shield, AC adapter, plus integral security slot, Core balances are ready to work right out of the box. Adam Equipment has been manufacturing balances and scales for over 35 years, providing professionals worldwide with quality products that are always the perfect balance of speed, performance, and value.