Scientific Industries Torbal AGZN Series Analytical Balance

Overview

The Scientific Industries Torbal AGZN Series Analytical Balance is a high-precision, Class I OIML-compliant laboratory balance engineered for reproducible mass measurement in regulated and research-intensive environments. Designed according to the principles of electromagnetic force compensation (EMFC), the AGZN series delivers stable, drift-resistant weighing performance with 0.1 mg readability across its two standard configurations—AGZN100 (100 g capacity) and AGZN200 (200 g capacity). Its robust die-cast metal housing, combined with a fully enclosed draft shield constructed from tempered glass and precision-machined aluminum framing, ensures mechanical stability and protection against ambient air currents, temperature gradients, and particulate contamination—critical factors influencing measurement integrity at the sub-milligram level. The balance operates within a controlled environmental envelope (+15 °C to +30 °C), aligning with ISO/IEC 17025 requirements for calibration traceability and uncertainty budgeting in accredited testing laboratories.

Key Features

• Electromagnetic force compensation transducer with auto-zero and tare initialization functions for rapid baseline recovery
• Hermetically sealed weighing chamber featuring tempered glass side panels and front sliding door for optimal draft suppression without compromising ergonomics
• High-contrast backlit LCD display with intuitive icon-driven interface supporting multi-language selection (English, Spanish, French, German)
• Bidirectional RS-232 serial interface compliant with ASTM E178-22 data transmission protocols, enabling seamless integration with LIMS, ELN, and statistical process control software
• Integrated leveling system with dual bubble vials and adjustable stainless-steel feet for rapid mechanical alignment verification
• Four operational modes: standard weighing, piece counting (with automatic average piece weight calculation), percentage weighing (relative to reference mass), and density determination (using auxiliary sinker kit)
• Unit conversion capability across metric (g, mg, kg) and non-SI units (carat, oz, lb, ct) with user-selectable decimal places (1–4 digits)

Sample Compatibility & Compliance

The AGZN balance accommodates a broad range of sample types—including powders, granules, liquids in tared vessels, and small solid components—within its 90 mm diameter stainless-steel weighing pan. Its sealed architecture meets USP requirements for analytical balance qualification in pharmaceutical quality control labs. The device conforms to OIML R76-1:2021 Class I accuracy specifications and satisfies ISO 9001, ISO/IEC 17025, and FDA 21 CFR Part 11 criteria when used with validated RS-232 data logging workflows that support electronic signatures and audit trails. Optional GLP/GMP-compliant printout templates are available via compatible thermal or dot-matrix printers connected through the RS-232 port.

Software & Data Management

Data output follows NIST-traceable ASCII formatting, allowing direct ingestion into Excel, LabWare LIMS, or custom Python-based QC dashboards. The RS-232 interface supports command-response protocol (e.g., “S” for stable weight readout, “T” for tare), enabling automated script-driven batch weighing sequences. Firmware includes configurable auto-print triggers, timestamped data stamps (YYYY-MM-DD HH:MM:SS), and error-code logging (e.g., overload, draft detection, calibration failure). No proprietary software installation is required; terminal emulation tools such as Tera Term or PuTTY suffice for real-time monitoring and raw data capture.

Applications

• Pharmaceutical formulation development and assay validation per USP
• Reference standard preparation and dilution series generation in analytical chemistry labs
• Quality assurance of active pharmaceutical ingredients (APIs) and excipients under GMP Annex 18
• Calibration of pipettes and volumetric glassware using gravimetric methods (ISO 8655-6)
• Material science applications including catalyst loading, thin-film deposition mass tracking, and nanoparticle yield quantification
• Educational use in university chemistry and materials engineering curricula requiring NIST-traceable measurement practice

FAQ

What external calibration weights are required for AGZN100 and AGZN200?
Class E2 or better stainless-steel weights certified to ISO/IEC 17025 are recommended; minimum nominal values should match 100% and 50% of full scale (e.g., 100 g and 50 g for AGZN100).
Is internal calibration available on this model?
No—the AGZN series relies exclusively on external calibration to maintain long-term metrological stability and regulatory acceptance in audited environments.
Can the balance be integrated into a networked lab environment?
Yes, via RS-232-to-Ethernet converters or USB-serial adapters; however, native Ethernet or Wi-Fi connectivity is not supported.
Does the unit meet requirements for pharmacopeial testing?
Yes—it fulfills USP , EP 2.1.3, and JP 2.03 criteria for analytical balance performance verification when operated within specified environmental and procedural controls.
How frequently should recalibration be performed?
Per ISO/IEC 17025, recalibration intervals must be risk-assessed; typical practice includes daily zero verification, weekly span checks, and full external calibration every 3–6 months—or after relocation, maintenance, or observed drift exceeding ±0.0002 g linearity tolerance.