Precision Balance B Series by AccuWeigh
| Key | Origin: Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Country of Origin | PRC |
| Model Range | B Series |
| Price Range | USD 570–700 (FOB) |
| Instrument Type | Precision Electronic Balance |
| Capacity Range | 310 g to 10 kg |
| Readability | 0.1 g / 1 g (selectable dual-range models) |
| Pan Dimensions | Ø130 mm or 160 × 160 mm |
| Power Supply | AC 220 V, 50 Hz |
| Construction | Stainless steel weighing pan, powder-coated metal base |
| Compliance | ISO 9001 manufacturing environment, conforms to OIML R76-1 (Class II) for non-automatic weighing instruments |
Overview
The Precision Balance B Series is a line of high-stability, microprocessor-controlled electronic balances engineered for routine mass measurement in laboratory, educational, and industrial quality control environments. Utilizing electromagnetic force compensation (EMFC) transduction technology, each unit delivers consistent repeatability and minimal drift under standard ambient conditions (20 ± 5 °C, <70% RH). Designed to meet the functional requirements of Class II non-automatic weighing instruments per OIML R76-1, the B Series supports both general-purpose weighing and discrete piece-counting applications without requiring recalibration between modes. Its robust mechanical architecture—featuring a stainless steel weighing pan and a rigid, vibration-damped powder-coated chassis—ensures long-term stability on typical lab benches or production floor surfaces. The balance operates exclusively on standard AC mains power (220 V, 50 Hz), eliminating battery-related uncertainty in continuous-use settings.
Key Features
- Electromagnetic force compensation (EMFC) sensor with automatic internal zero-tracking and drift compensation
- Selectable readability options: 0.1 g for fine mass verification; 1 g for rapid bulk weighing or counting
- Stainless steel circular pan (Ø130 mm) or square pan (160 × 160 mm), chemically resistant and easy to clean
- Dual-display interface: optional LED (high-brightness, wide viewing angle) or LCD (low-power, glare-resistant) configuration
- Standard tare, preset tare, and piece-counting functions with automatic average piece weight calculation
- RS-232 serial port for direct data export to PCs, LIMS, or statistical process control (SPC) software
- Overload protection up to 150% of nominal capacity; audible and visual alert on exceedance
- Calibration-ready design: compatible with external Class M2 or M1 weights per ISO/IEC 17025 calibration protocols
Sample Compatibility & Compliance
The B Series accommodates solid samples—including powders, granules, pre-weighed vials, and small components—within its defined pan geometry and height clearance. No volatile or corrosive sample handling is supported without appropriate containment (e.g., draft shields or weigh boats). All units are assembled in an ISO 9001-certified facility and undergo factory verification against traceable national standards. While not certified for legal-for-trade use in regulated markets (e.g., EU MID or US NTEP), the series meets technical prerequisites for internal QC, teaching labs, and R&D pre-screening where formal metrological accreditation is not mandated. Documentation includes full test reports (linearity, repeatability, eccentricity, and sensitivity) per EN 45501 Annex A.
Software & Data Management
Data output via RS-232 follows standard ASCII protocol (9600 baud, 8N1), enabling seamless integration with third-party spreadsheet tools, LabArchives, or custom Python-based acquisition scripts. Optional Windows-compatible utility software provides timestamped logging, basic statistics (mean, SD, CV%), and CSV export with user-defined field headers. Audit trail functionality is not embedded; however, the balance supports GLP-compliant workflows when paired with externally validated data capture systems that enforce 21 CFR Part 11 controls (electronic signatures, change history, and user access logs).
Applications
- Academic instruction: quantitative chemistry labs, physics mass-energy experiments, materials science coursework
- Industrial QC: raw material receipt inspection, batch sampling, packaging net-weight verification
- R&D support: formulation development, catalyst loading, reagent dispensing checks
- Pharmaceutical ancillary use: excipient weighing prior to analytical method validation (non-GMP)
- Maintenance and calibration labs: as a reference standard for verifying lower-tier scales or checking weight set integrity
FAQ
What calibration standards are recommended for routine verification?
Class M2 weights (per ISO 9001 Annex C) are suitable for daily checks; Class M1 weights are advised for periodic full-range linearity assessment.
Is the balance compatible with draft shields or anti-vibration tables?
Yes—standard mounting holes align with common third-party draft enclosures; base footprint allows stable placement on ISO 5347-compliant isolation tables.
Can the balance be used in environments with elevated humidity or temperature fluctuations?
Operation is rated for 10–30 °C and ≤70% RH non-condensing; extended exposure outside this range may affect zero stability and repeatability.
Does the RS-232 interface support bi-directional communication?
No—it is transmit-only; commands such as tare or print cannot be sent from host software.
Are firmware updates available?
Firmware is fixed at time of manufacture; no field-upgrade capability is provided.
