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- info@limrainstruments.com
- Vasai (E), Maharashtra
OIML Standard Weights Box Class M1-M2
Practical Calibration Standards for Industrial Accuracy
Consistent weighing performance in industrial and commercial applications depends on reliable reference weights. Limra Instruments manufactures high-quality OIML Standard Weights Boxes - Class M1 and Class M2 in India, engineered to provide dependable calibration support for platform scales, bench scales, and general industrial weighing systems.
Designed for durability and accuracy, our M1 and M2 weight sets are ideal for routine verification, field calibration, and quality assurance processes.
Understanding OIML Class M1 & M2 :
The OIML classification system defines permissible tolerance limits for calibration weights based on their intended application.
- Class M1 :
Suitable for calibrating industrial and commercial weighing instruments.
Commonly used in factories, warehouses, and trade applications. - Class M2 :
Designed for general-purpose industrial weighing verification where moderate tolerance levels are acceptable.
Limra Instruments manufactures these classes following controlled machining and verification procedures to ensure dependable field performance.
Engineered for Industrial Use :
Unlike laboratory-focused classes, M1 and M2 weights are designed to withstand regular handling and industrial environments.
Our weights are manufactured using :
- High-grade cast iron or stainless steel (as required)
- Durable protective coating (for cast iron models)
- Precision finishing
- Long-term mass stability design
Each weight is adjusted to meet OIML-specified tolerance limits.
Product Features :
- OIML-compliant Class M1 & M2 tolerances
- Rugged industrial-grade construction
- Corrosion-resistant finish
- Clear and durable weight marking
- Protective storage box or carrying case
- Stackable and easy-to-handle designs
- Optional calibration documentation
The weight boxes are designed for convenient transport and organized storage.
Typical Applications :
Limra OIML M1 & M2 Standard Weights Boxes are widely used in :
- Industrial manufacturing plants
- Warehouse and logistics facilities
- Agricultural markets
- Scrap and metal industries
- Trade verification
- Platform and floor scale calibration
- Routine maintenance checks
These weight sets are ideal for field technicians and maintenance teams.
Available Weight Combinations :
We provide various configurations including:
- 1 g to 10 kg combinations
- 10 g to 20 kg sets
- Mixed industrial calibration kits
- Custom weight combinations as per client requirement
Custom sets can be designed according to application-specific needs.
Built for Durability & Repeated Use :
Industrial calibration often involves frequent handling. Our M1 and M2 weights are designed to:
- Resist surface wear
- Maintain dimensional integrity
- Withstand moderate environmental exposure
- Deliver stable long-term performance
The storage cases ensure organized handling and protection during transport.
Quality Control & Verification :
Each weight set undergoes :
- Mass tolerance verification
- Surface finish inspection
- Stability testing
- Final quality approval
Only compliant sets are released for dispatch.
Why Choose Limra Instruments? :
- Indian manufacturer with strong industrial expertise
- OIML-compliant M1 and M2 production
- Durable and rugged construction
- Customizable calibration kits
- Reliable technical support
- Competitive pricing for industrial markets
We focus on delivering practical calibration solutions that support daily operational accuracy.
Trusted OIML M1 & M2 Weights Box Manufacturer in India :
For dependable industrial calibration standards, Limra Instruments offers precision-engineered OIML Class M1 and M2 Standard Weights Boxes built for durability, performance, and field reliability.
Contact us today to discuss your industrial calibration requirements and receive a customized quotation.
Technical Specifications : OIML Standard Weights Box (Class M1 – M2)
| Parameter | Specification |
|---|---|
| Applicable Standard | OIML R111-1 (Latest Revision) |
| Accuracy Class | M1 / M2 |
| Accuracy Level | M1 – Medium accuracy M2 – Commercial/Industrial accuracy |
| Weight Range (Typical Set) | 1 mg to 200 g (standard box) |
| Extended Range (Optional) | Up to 20 kg or higher |
| Number of Pieces | 23 pieces (standard set) / customizable |
| Material (Small Weights) | Stainless Steel (SS 304 / SS 316) |
| Material (Large Weights) | Stainless Steel / Cast Iron / Brass |
| Density (Typical) | ~8000 kg/m³ (SS) |
| Shape (1 mg – 500 mg) | Sheet / Wire type (triangular, square, pentagon) |
| Shape (1 g – 20 kg) | Cylindrical with knob |
| Shape (≥5 kg) | Rectangular block with handle |
| Adjusting Cavity | Provided ≥100 g (mandatory), Sealed with a Plug |
| Cavity Volume Limit | Max 25% of total volume |
| Surface Finish | Mirror polished / Satin finish |
| Magnetic Properties | Non-magnetic (preferred) |
| Corrosion Resistance | High (SS construction) |
| Marking | Nominal value, Class (M1/M2), Manufacturer (optional) |
| Maximum Permissible Error (MPE) | As per OIML R111 Table |
| Example MPE (1 g) | M1: ±5 mg, M2: ±16 mg |
| Example MPE (100 g) | M1: ±50 mg, M2: ±160 mg |
| Storage Box Material | Wooden / ABS / Aluminium |
| Box Features | Foam-lined, Anti-Dust, Compartmentalised |
| Accessories Included | Forceps, Gloves, Cleaning brush |
| Calibration Certificate | NABL / ISO 17025 traceable |
| Calibration Details | Mass value, Uncertainty, Traceability |
| Operating Temperature | 20°C ± 2°C |
| Humidity Condition | ≤ 60% RH |
| Applications | Industrial Calibration, Packaging, and Commercial Weighing |
| Compliance | OIML Certified / Traceable Standards |
Typical Weight Combination (23 pcs Set)
| Weight Values | |
|---|---|
| 1, 2, 5 mg | 1, 2, 5 g |
| 10, 20, 50 mg | 10, 20, 50 g |
| 100, 200, 500 mg | 100, 200 g |