Amazon.com: U.S. Solid 0.1g Electronic Precision Balance Lab Digital Balance Scale, RS232 & USB Interface, AC100V-240V & DC4x1.5V, 19 Measurement Units (3kg) : Industrial & Scientific
Amazon.com: U.S. SOLID 120g/0.1mg Analytical Balance, Digital Precision Lab Scale 0.0001g, RS232 Interface : Industrial & Scientific
Amazon.com: U.S. Solid 1mg Analytical Balance High Precision Digital Lab Scale with 2 LCD Screens, RS232 USB Interface (100gx0.001g) : Industrial & Scientific