METTLER TOLEDO LE2002E Precision Analytical Balance
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Beijing, China |
| Model | LE2002E |
| Type | Analytical Balance |
| Max Capacity | 2200.0 g |
| Readability | 0.01 g |
| Accuracy | ±0.02 g |
| Repeatability | ±0.01 g |
| Calibration | External |
| Pan Size | 180.0 mm |
| Power Supply | AC Mains |
Overview
The METTLER TOLEDO LE2002E is a precision analytical balance engineered for routine laboratory weighing tasks requiring reliable accuracy, robust repeatability, and intuitive operation. Designed within METTLER TOLEDO’s LE series—a value-optimized line developed specifically for educational institutions, quality control labs, and industrial settings with high-throughput basic weighing needs—the LE2002E employs electromagnetic force restoration (EMFR) technology to deliver stable, drift-compensated measurements under variable environmental conditions. With a maximum capacity of 2200.0 g and readability of 0.01 g, it bridges the functional gap between entry-level precision balances and higher-tier analytical instruments, making it suitable for applications where traceability, documentation, and regulatory alignment are increasingly expected—even in non-GxP environments.
Key Features
- Electromagnetic force restoration (EMFR) sensor architecture ensures high long-term stability and minimal thermal drift across ambient temperature fluctuations (10–30 °C).
- 180.0 mm stainless steel weighing pan provides ample surface area for larger samples or containers while maintaining mechanical rigidity and corrosion resistance.
- External calibration capability supports traceable verification using certified weights compliant with ISO/IEC 17025 and ASTM E898 standards; calibration log can be manually recorded per internal SOPs.
- AC-powered design eliminates battery dependency, enabling continuous operation in fixed-location lab environments without recalibration due to power interruption.
- Intuitive front-panel interface with large, high-contrast LCD display supports rapid parameter navigation and real-time weight readout with overload and underload indicators.
- Robust housing meets IP42 ingress protection rating, offering resistance to dust and incidental liquid splashes during daily handling.
Sample Compatibility & Compliance
The LE2002E accommodates a broad range of sample types—including powders, granules, liquids in tared vessels, and solid components—within its 2200.0 g capacity limit. Its 0.01 g readability enables consistent measurement of formulations, reagents, and raw materials in pharmaceutical pre-formulation, food ingredient batching, polymer compounding, and academic chemistry labs. While not equipped with built-in GLP/GMP audit trail or 21 CFR Part 11-compliant user authentication, the balance supports manual compliance workflows: calibration records, daily performance checks, and environmental monitoring logs can be maintained externally in accordance with ISO 9001, ISO/IEC 17025, and USP general chapter requirements for weighing instrument qualification.
Software & Data Management
The LE2002E features an RS232 serial interface for direct connection to PCs, label printers, or laboratory information systems (LIS). Data output follows standard ASCII format with configurable delimiters and optional timestamping via host software. While the device does not include proprietary data acquisition software or cloud connectivity, it is compatible with third-party platforms such as LabWare LIMS, Thermo Fisher SampleManager, and open-source tools like Python-based PySerial scripts for automated data capture and CSV export. All weight values are transmitted with full resolution (0.01 g), enabling downstream statistical process control (SPC) analysis when integrated into QA/QC reporting pipelines.
Applications
- Pharmaceutical: Weighing active pharmaceutical ingredients (APIs) and excipients during tablet formulation development and batch release testing.
- Food & Beverage: Portion control verification, nutritional labeling preparation, and moisture content determination via loss-on-drying protocols.
- Education: Student laboratories conducting stoichiometric calculations, solution preparation, and gravimetric analysis experiments.
- Materials Science: Measuring composite material ratios, catalyst loading, and additive dosing in R&D-scale synthesis.
- Environmental Testing: Sample preparation for ICP-OES, AAS, and TGA analyses where sub-10 mg precision is not required but consistency across multi-operator shifts is critical.
FAQ
What is the recommended calibration frequency for the LE2002E?
Calibration should be performed before first use, after relocation, following significant ambient temperature changes (>5 °C), and at least once per shift in regulated environments—per internal SOPs aligned with ISO 17025 clause 6.5.2.
Does the LE2002E support internal calibration?
No. The LE2002E requires external calibration using Class M2 or better certified weights traceable to national metrology institutes.
Can the balance be used in a fume hood?
Yes, provided the unit is installed on a vibration-isolated, level surface and airflow velocity at the pan position remains below 0.2 m/s to avoid draft-induced instability.
Is the RS232 interface optically isolated?
No. Electrical isolation is not integrated; users deploying in electrically noisy industrial settings should employ shielded cabling and grounded serial adapters.
What is the warm-up time required for optimal performance?
A minimum of 30 minutes is recommended after power-on to achieve thermal equilibrium of the EMFR sensor and internal reference electronics.
