SUNNY HENGPING MP/JA Series Hydrostatic Balance
| Brand | SUNNY HENGPING INSTRUMENT |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | MP/JA Hydrostatic Balance |
| Measuring Range | 2100–6100 g |
| Readability | 0.1 g / 0.01 g (depending on variant) |
| Repeatability | ±0.1 g / ±0.01 g |
| Linearity Error | ±0.2 g / ±0.02 g |
| Pan Dimensions | 174 × 143 mm or Φ180 mm |
| Interface | RS232 |
| Operating Temperature | 5–40 °C |
| Relative Humidity | ≤85% RH |
| Calibration | Manual |
| Construction | Cast Aluminum Hydrostatic Fixture with Anti-drop Feet and Swivel Casters |
Overview
The SUNNY HENGPING MP/JA Series Hydrostatic Balance is a precision measurement system engineered for the accurate determination of solid sample density and volume via hydrostatic weighing—also known as Archimedean density measurement. This instrument integrates a high-stability electronic balance with a purpose-built hydrostatic fixture, enabling direct mass comparison of a sample in air and submerged in a reference fluid (typically distilled water at controlled temperature). The principle relies on buoyant force displacement, where sample volume is calculated from the difference in apparent mass under ambient and immersed conditions, and density is derived using the known density of the immersion medium. Designed for routine quality control laboratories, materials testing facilities, and academic research environments, the MP/JA series delivers traceable, reproducible results aligned with ASTM D792, ISO 1183-1, and GB/T 1033.1 standards for plastic, ceramic, metal, and composite material characterization.
Key Features
- Modular architecture combining a calibrated electronic balance and an integrated hydrostatic assembly—no external fixtures or third-party accessories required.
- Cast aluminum hydrostatic fixture engineered for dimensional stability, corrosion resistance, and long-term mechanical integrity under repeated immersion cycles.
- Anti-drop protective feet minimize risk of damage during sample loading/unloading, enhancing operational safety and instrument longevity.
- 360° swivel casters with locking mechanism allow smooth repositioning and ergonomic alignment relative to sinks, water baths, or fume hoods—critical for high-throughput labs.
- Manual calibration procedure compliant with internal QA protocols; supports periodic verification using certified weights traceable to national metrology institutes.
- RS232 serial interface enables direct data export to LIMS, Excel, or custom lab software—supporting audit-ready documentation workflows.
Sample Compatibility & Compliance
The MP/JA series accommodates solid samples ranging from small granules (<5 g) to bulk industrial parts (up to 6.1 kg), provided they are non-porous or effectively sealed against fluid ingress. Compatible with standard aqueous immersion media (e.g., deionized water, ethanol, or silicone oil) at temperatures between 15–25 °C. All variants meet CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). Design and test procedures align with ISO/IEC 17025:2017 clause 6.4 (equipment validation) and support GLP-compliant density reporting when used with documented environmental monitoring and calibration records.
Software & Data Management
While the MP/JA operates as a standalone hardware system without proprietary software, its RS232 output transmits real-time mass values (air weight, immersed weight, temperature-stamped timestamps) in ASCII format at user-configurable baud rates (9600 default). Integration with third-party applications—including LabVIEW, Python-based data loggers, or enterprise LIMS—is validated through protocol documentation provided in the technical manual. Audit trails can be established by pairing the balance with timestamped logging software that captures operator ID, calibration status, ambient temperature/humidity logs, and raw hydrostatic calculation inputs—satisfying FDA 21 CFR Part 11 requirements for electronic records when deployed in regulated pharmaceutical or medical device QC settings.
Applications
- Density verification of injection-molded polymer components per ISO 1183-1 for batch release compliance.
- Porosity assessment of sintered metal powders using liquid displacement methodology.
- Quality assurance of ceramic tiles and refractory bricks in building materials manufacturing.
- Teaching laboratory implementation for undergraduate physics and materials science courses demonstrating Archimedes’ principle.
- Verification of specific gravity in recycled plastic feedstock prior to extrusion processing.
- Supporting ASTM D2766 (specific gravity of plastics) and ASTM C20 (bulk density of refractories) test methods.
FAQ
What is the maximum sample size the hydrostatic fixture can accommodate?
The Φ180 mm pan configuration supports samples up to 150 mm in height and 170 mm in diameter when fully immersed; clearance above the water surface allows for suspension wire routing and meniscus management.
Does the system require temperature-controlled water baths?
While not mandatory, density accuracy improves significantly when water temperature is monitored and recorded (±0.5 °C resolution recommended); built-in temperature compensation is not provided, so manual input of fluid density at measured temperature is required in calculations.
Can the balance be used for liquid density measurement?
No—the MP/JA series is specifically designed for solid sample characterization via hydrostatic displacement; liquid density requires a pycnometer or digital densitometer.
Is GMP/GLP documentation support available?
Yes—full traceability documentation, including factory calibration certificates, uncertainty budgets, and IQ/OQ templates, is supplied upon request for regulated users.
How often should manual calibration be performed?
Daily calibration is recommended before first use; additional calibration is required after relocation, significant ambient temperature shifts (>5 °C), or after exposure to mechanical shock.
