Yoke FB Series Fully Glass-Touch Analytical Balance
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | FB |
| Instrument Type | Analytical Balance |
| Maximum Capacity | 200 g |
| Readability | 0.1 mg |
| Repeatability | 0.1 mg |
| Calibration | Automatic Internal Calibration |
| Data Storage | 500 entries |
| User Management | Multi-user support |
| Operating Environment | Real-time sensor temperature display with automatic temperature compensation |
| Leveling | Front-mounted bubble level indicator |
| Enclosure | Patented circular glass draft shield with enhanced sealing |
| Key Interface | Full-surface tempered glass touch keypad (rated for ≥50,000 actuations) |
| Software | SUPERTEXT 1.0 — featuring animal weighing, density determination, formulation weighing, accumulation, checkweighing, percentage weighing, counting, and target weighing modules |
Overview
The Yoke FB Series Fully Glass-Touch Analytical Balance is an ISO/IEC 17025-aligned precision mass measurement instrument engineered for laboratory environments requiring high repeatability, environmental resilience, and regulatory traceability. Built upon a monolithic electromagnetic force compensation (EMFC) transducer architecture, the FB Series delivers stable, drift-compensated measurements under variable ambient conditions. Its core design integrates real-time sensor temperature monitoring and automatic thermal compensation—critical for maintaining metrological integrity across diurnal temperature fluctuations common in QC labs and academic research facilities. The balance operates within Class I accuracy per OIML R 76-1 and meets the performance criteria specified in USP for analytical weighing applications, supporting GLP-compliant documentation workflows when paired with validated software protocols.
Key Features
- Full-surface tempered glass touch interface: Chemically strengthened borosilicate glass keypad with capacitive sensing technology, rated for ≥50,000 actuations—significantly exceeding polymer membrane durability while enabling seamless glove-compatible operation and simplified surface decontamination.
- Patented circular glass draft shield: Precision-machined, low-profile cylindrical enclosure with integrated magnetic latching mechanism ensures consistent airflow isolation, minimizing convective interference and meeting ISO 9001-controlled environment requirements for microgram-level stability.
- Real-time thermal intelligence: On-board thermistor array continuously monitors load cell temperature; proprietary compensation algorithm adjusts zero and sensitivity coefficients dynamically to maintain ±0.1 mg repeatability across 15–30 °C operating range.
- Front-mounted leveling system: Dual-axis bubble level positioned at eye level simplifies setup verification without repositioning the balance—reducing installation time and mitigating tilt-induced error per ASTM E898-22 guidelines.
- Internal automatic calibration: Motor-driven calibration mass deployment triggered by time intervals, temperature thresholds, or manual command—ensuring ongoing traceability to internal reference standards compliant with ISO/IEC 17025 Clause 6.5.2.
Sample Compatibility & Compliance
The FB Series accommodates standard analytical sample containers (e.g., weighing boats, crucibles, vials) up to 120 mm in diameter beneath its draft shield. Its 200 g capacity and 0.1 mg readability satisfy routine pharmacopeial assays (USP , EP 2.1.6), raw material verification per ICH Q5E, and gravimetric preparation of reference standards in accordance with ISO/IEC 17034. The balance’s firmware supports audit trail logging (user ID, timestamp, action type, pre/post-value) aligned with FDA 21 CFR Part 11 requirements when SUPERTEXT 1.0 is deployed in validated mode. All mechanical and electrical components comply with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD) and RoHS 2011/65/EU substance restrictions.
Software & Data Management
SUPERTEXT 1.0 is a Windows-based, GxP-ready application certified for use in regulated environments. It provides secure, role-based user authentication (administrator/operator modes), encrypted local database storage (SQLite with AES-256), and export to CSV, PDF, or XML formats compliant with LIMS integration protocols (ASTM E1578-21). Preconfigured modules include: animal weighing (tare stabilization during live subject placement), density determination (Archimedean method with buoyancy correction), formulation weighing (multi-step batch component addition with tolerance alerts), and checkweighing (binning logic with visual/audible pass/fail indicators). Audit trails are immutable and exportable for regulatory review without third-party dependencies.
Applications
- Pharmaceutical quality control: Active pharmaceutical ingredient (API) assay preparation, excipient blending verification, and tablet weight uniformity testing per USP .
- Materials science: Precise dosing of catalysts, nanomaterials, and polymer additives where sub-milligram variability impacts reaction kinetics or composite homogeneity.
- Environmental testing labs: Gravimetric analysis of filter media (e.g., PM2.5 filters per EPA Method 201A) requiring documented mass stability over extended equilibration periods.
- Academic research: Isotope ratio mass spectrometry (IRMS) sample loading, electrochemical electrode coating quantification, and calorimetric standard preparation.
- Food safety laboratories: Nutrient fortification validation, allergen cross-contamination assessment, and moisture content determination via loss-on-drying protocols.
FAQ
What calibration standards are required for routine verification?
The FB Series includes internal calibration masses traceable to NIM (National Institute of Metrology, China) certified references. External verification should use Class E2 or better weights per ISO 9001 Annex A.3.3.
Is SUPERTEXT 1.0 compatible with networked LIMS environments?
Yes—via configurable ODBC drivers and HL7-compliant data export templates; IT administrators may define field mapping rules for seamless ingestion into LabVantage, Thermo Fisher SampleManager, or custom SQL-based systems.
How does the glass draft shield affect measurement stability during rapid weighing cycles?
The low-inertia circular geometry minimizes air displacement turbulence; internal pressure equalization vents reduce transient barometric effects, achieving <2 s stabilization time for 99% of 0.1 mg increments under ISO 17025 ambient test conditions.
Can the balance operate in environments with >60% relative humidity?
Yes—sealed EMFC sensor housing and conformal-coated PCBs meet IP54 ingress protection; however, prolonged exposure above 80% RH requires optional desiccant chamber integration to prevent long-term drift.
Does the system support 21 CFR Part 11 electronic signatures?
SUPERTEXT 1.0 implements dual-factor authentication (password + biometric token option), electronic signature capture with cryptographic hashing, and full audit trail export—validated per Annex 11 and ALCOA+ principles.
