A&D Gemini GR Series analytical balances combine 0.1 mg readability with automatic self-calibration, an internal adjustment weight and an easy-access weighing chamber. Choose GR-120 with 120 g capacity, GR-200 with 210 g or GR-300 with 310 g. A front lever opens either side door when the door joint is connected, and the 249 × 330 mm footprint saves bench space. Anti-static coated glass and a two-layer housing help control static and ambient-temperature effects.

Adjustable response settings adapt to drafts and vibration. Counting mode includes Automatic Counting Accuracy Improvement (ACAI), with percentage weighing and solid-density measurement modes. The underweigh hook supports below-balance applications; the optional density determination kit provides the corresponding fixture. The LCD can refresh 5 or 10 times per second, with automatic power-on and a keyboard/display protected from dust and spills.

Store up to 200 weighing results in non-volatile memory, including interval recording. RS-232C supports printer or computer connection, computer commands and key, auto-print or stream output; WinCT provides bidirectional communication, transfer to applications and weighing graphs. Serial output is unavailable during memory storage, automatic self-calibration is unavailable during interval recording, and GLP title/end blocks are unavailable while memory is enabled. Match the selected interface, printer and report settings to your workflow.

GLP/GMP/GCP/ISO-compliant calibration-data output includes the balance ID for calibration confirmation. Use the model-specific external calibration masses when required; external masses are separate from the standard internal adjustment weight. Select the AC adapter for the unit’s receptacle and local voltage, allow at least one hour of warm-up and recalibrate after moving the balance. The balance has a five-year limited warranty.