Overview
Laboratory mouse electronic scales are specialized weighing instruments designed for biomedical and pharmacological research. These devices provide precise measurements of small animals, typically with capacities ranging from 300g to 3kg and resolutions as fine as 0.01g. Modern units often include USB/Bluetooth connectivity for data transfer to laboratory information systems. Unlike general-purpose scales, mouse scales feature low-profile platforms to minimize stress on animals during weighing. Many models comply with GLP/GMP standards and include features like dynamic weighing for moving subjects. Their use is critical in studies requiring dose calculations or growth monitoring.
Structure and Working Principle
These scales utilize strain gauge load cells beneath a stainless steel weighing platform. When force is applied, the load cell deforms slightly, changing its electrical resistance proportionally to the weight. This signal is processed by a high-precision analog-to-digital converter. The housing typically uses static-dissipative materials to prevent interference. Advanced models incorporate anti-vibration compensation and draft shields. The digital display shows weight readings instantly, with options for unit conversion (grams, ounces, carats). Some industrial-grade versions feature IP54-rated enclosures for washdown environments.
Key Features
Precision is paramount, with research-grade models achieving ±0.1% of reading accuracy. The tare function allows container weight subtraction, essential for restraining devices. Many scales offer animal-specific modes that average measurements during movement. Data logging capabilities are standard, with capacities for 100-10,000 records. Top-tier models include barcode scanners for sample ID integration. Battery backup (30-100 hours) ensures uninterrupted operation during power outages. Some units provide density calculation for body composition studies.
Application Areas
Primary users include pharmaceutical companies conducting preclinical trials (GLP 21 CFR Part 58), university biology departments, and contract research organizations. Applications range from toxicity studies to nutritional research and genetic modification monitoring. In vaccine development, these scales verify inoculation doses by animal weight. Zoos and breeding facilities employ them for health tracking. Veterinary clinics use compact versions for rodent examinations. Recent applications extend to cannabis research for dosing studies in animal models.
Maintenance and Precautions
Monthly calibration with certified weights is recommended. Use ethanol-based cleaners for sanitation without damaging load cells. Avoid placing scales near HVAC vents or electromagnetic equipment that may cause interference. Store in temperature-controlled environments (15-25°C) when not in use. Check leveling feet regularly - even slight tilts affect accuracy. For scales with RS232 ports, inspect cables for fraying. Manufacturers typically recommend professional servicing every 2-3 years to maintain NIST traceability.
B2B Procurement Guide
For bulk purchases (10+ units), request OEM customization like branded software or specialized platforms. Evaluate suppliers' ISO 9001 and ISO 17025 certifications for quality assurance. Consider total cost of ownership: models with platinum-certified load cells last 5-7 years versus 2-3 for aluminum sensors. Negotiate service contracts covering calibration and parts replacement. Leading manufacturers include Adam Equipment, Ohaus, and Sartorius, with lead times of 4-8 weeks for configured orders. Request sample units for lab technician evaluation before large orders.
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