METTLER TOLEDO ME4002E/02 Precision Balance
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Shanghai, China |
| Model | ME4002E/02 |
| Maximum Capacity | 4200 g |
| Readability | 0.01 g |
| Repeatability (typ.) | 0.007 g |
| Minimum Weight (USP <1>, k=2, typical) | 14 g |
| Stabilization Time | 1.5 s |
| Calibration | External |
| Display | Backlit LCD |
| Interface | RS232 (integrated), Bluetooth (optional) |
| Pan Size | 180 mm × 180 mm |
| Dimensions (H×W×D) | 100 mm × 200 mm × 319 mm |
| Housing | Die-cast aluminum & ABS |
| Weighing Pan | Stainless steel |
| Overload Protection | Yes |
| Legal-for-Trade Certification | Not applicable |
Overview
The METTLER TOLEDO ME4002E/02 is a high-reliability precision balance engineered for routine laboratory and industrial weighing tasks requiring consistent accuracy across extended capacity ranges. Operating on electromagnetic force compensation (EMFC) technology, it delivers stable, drift-resistant measurements under variable environmental conditions—including minor air currents, temperature fluctuations, and mechanical vibration common in shared lab spaces or production QA environments. With a maximum capacity of 4200 g and readability of 0.01 g (10 mg), the ME4002E/02 meets the performance criteria defined in ISO 9001-controlled processes and aligns with analytical workflows where repeatability ≤ 0.007 g (typ.) and stabilization time ≤ 1.5 s are critical to throughput efficiency. Its design prioritizes operational robustness over feature proliferation—making it especially suited for QC labs performing bulk sample preparation, formulation checks, raw material verification, and packaging weight validation.
Key Features
- Electromagnetic force compensation (EMFC) transducer ensures long-term stability and minimal drift across temperature gradients (15–30 °C operating range).
- Dual-material housing: die-cast aluminum base provides structural rigidity and thermal mass; ABS upper enclosure reduces static accumulation and supports ESD-safe operation.
- Stainless steel weighing pan (180 mm × 180 mm) with integrated overload protection—rated for ≥ 150% of max capacity without calibration shift.
- Backlit LCD display with high-contrast alphanumeric characters, optimized for viewing at angles up to ±30° and under ambient illumination ≥ 300 lux.
- Integrated RS232 interface enables direct connection to label printers, LIMS, or legacy data acquisition systems without external adapters.
- External calibration protocol compliant with ISO 4787 and ASTM E898—supports traceable adjustment using Class M2 or better weights.
- Leveling system with dual adjustable feet and integrated bubble level ensures rapid setup on non-ideal surfaces (±2° tilt tolerance).
Sample Compatibility & Compliance
The ME4002E/02 accommodates diverse sample forms—including powders, granules, liquids in containers, and irregular solids—without compromising repeatability. Its large pan surface and low-profile geometry minimize center-of-gravity errors during off-center loading. While not certified for legal-for-trade applications (e.g., retail or pharmaceutical dispensing per OIML R76), the balance satisfies internal quality control requirements aligned with ISO/IEC 17025:2017 clause 6.4.1 (equipment suitability). Minimum weight determination follows USP guidelines: typical minimum weight = 14 g at U = 1%, k = 2, verified using standard uncertainty propagation methods. The device complies with IEC 61326-1 (EMC) and IEC 61010-1 (safety), and its construction materials meet RoHS Directive 2011/65/EU restrictions.
Software & Data Management
Data output is managed via ASCII-based RS232 protocol (9600 baud, 8N1), supporting automated transfer of net/gross/tare values, date/time stamps, and stability flags. Optional Bluetooth 4.2 module (sold separately) enables wireless transmission to Windows/macOS hosts running METTLER TOLEDO LabX Lite or third-party SCADA platforms. All transmitted records include embedded metadata: instrument ID, firmware version, calibration timestamp, and operator-defined sample ID. While the ME4002E/02 does not embed 21 CFR Part 11 audit trails or electronic signatures, its deterministic output format allows integration into validated GxP systems when paired with compliant middleware that logs user actions, timestamps, and data integrity checks.
Applications
- Raw material receipt inspection in chemical and food manufacturing facilities.
- Batch weight verification prior to tablet compression or capsule filling.
- Standard preparation for titrimetric and spectrophotometric assays (e.g., primary standard dilutions).
- Moisture content determination support via gravimetric loss-on-drying protocols (ASTM D2231, ISO 1189).
- Calibration mass handling for lower-capacity analytical balances (e.g., verifying 10 g–2 kg check weights).
- Teaching laboratories requiring durable, intuitive instrumentation for metrology fundamentals instruction.
FAQ
Is the ME4002E/02 suitable for GLP or GMP-regulated environments?
Yes—when deployed within documented procedures covering calibration frequency, environmental monitoring, and data recording, it fulfills equipment qualification requirements for non-critical weighing steps.
Does it support internal calibration?
No—calibration requires external weights; the unit lacks motorized internal mass or automatic calibration mechanism.
What is the recommended recalibration interval?
Per ISO/IEC 17025, recalibration should occur at least daily before first use, after relocation, or following any event affecting mechanical integrity (e.g., impact, cleaning with solvents).
Can it be used in humid or dusty environments?
It carries IP42 ingress protection—suitable for dry indoor labs only; not rated for washdown or high-humidity settings.
Is the RS232 interface optically isolated?
No—RS232 is electrically coupled; use of an isolating USB-to-RS232 adapter is advised when connecting to grounded PCs in electrically noisy facilities.
