Microbalances – Ultra-Precision Weighing to 0.001 mg (1 μg)
Our microbalances are the most precise weighing instruments available for laboratory use, offering readability down to 0.001 mg (1 microgram) for the accurate measurement of ultra-small sample quantities. Designed for applications where conventional analytical balances cannot provide sufficient resolution, microbalances are essential in pharmaceutical research, environmental monitoring, materials science, and any discipline where microgram-level accuracy is critical to the validity of results.
At microgram resolution, even the smallest environmental disturbances — air currents, vibration, electrostatic charge, temperature fluctuations, and humidity changes — can significantly affect weighing accuracy. Microbalances are therefore engineered with advanced vibration compensation, fully enclosed draft shields, anti-static systems, and environmental monitoring to maintain measurement integrity under real laboratory conditions. Automatic internal calibration using motorised reference weights ensures the balance remains within specification throughout the working day without operator intervention. For regulated environments, GLP/GMP compliance features including audit trails, user management, and method-guided workflows are available as standard on most models.
Key Features
- Readability to 0.001 mg (1 μg) for ultra-precise measurement of microgram-level samples
- Advanced vibration compensation for stable readings in real laboratory environments
- Fully enclosed draft shields with anti-static protection to eliminate environmental interference
- Automatic internal calibration with motorised reference weights for continuous accuracy
- Environmental monitoring — temperature, humidity, and level sensors for optimal measurement conditions
- GLP/GMP compliance features — audit trail, user management, and method documentation
- RS-232, USB, and Ethernet connectivity for LIMS, data logging, and printer integration
- Capacities typically from 2 g to 10 g suited to ultra-small sample weighing tasks
Common Applications
- Pharmaceutical research — API weighing, potent compound handling, and micro-dosage formulation
- Environmental monitoring — gravimetric filter weighing for particulate matter (PM2.5, PM10) analysis
- Materials science — thin film, coating, and nano-material mass determination
- Forensic analysis — trace evidence weighing and controlled substance quantification
- Biotechnology — DNA, protein, and enzyme sample preparation at microgram scale
- Metrology and calibration — reference weight calibration and mass comparator applications
All microbalances are sourced from leading laboratory instrument manufacturers and are available with UKAS-traceable calibration certificates on request. Contact our technical team for advice on selecting the right microbalance for your application, environment, and regulatory requirements.
Frequently Asked Questions
What is the difference between a microbalance and an analytical balance?
An analytical balance typically offers readability of 0.1 mg (0.0001 g). A microbalance offers readability of 0.001 mg (1 μg) or finer — 100 times more sensitive. Microbalances are used when sample quantities are in the microgram range and analytical balance resolution is insufficient. They require more controlled environmental conditions and greater care in operation to achieve their rated accuracy.
What environmental conditions are needed for accurate microbalance readings?
Microbalances require a stable, vibration-free surface (ideally an anti-vibration table), a draught-free environment, controlled temperature and humidity, and protection from electrostatic charge. Many models include built-in environmental sensors and vibration compensation, but siting the balance correctly is equally important. Avoid locations near air conditioning vents, doors, windows, or high-traffic areas.
How do I handle samples safely at microgram scale?
Use appropriate sample handling tools such as fine forceps, micro-spatulas, and anti-static sample containers. Allow samples and containers to equilibrate to room temperature before weighing. Use the tare function to zero out the container weight. For hygroscopic or volatile samples, minimise exposure time and consider using a closed weighing vessel. Anti-static ionisers are recommended for powders and fine particulates.
Do microbalances comply with GLP and GMP requirements?
Yes. Most models in our range include GLP/GMP compliance features including date/time stamping, user login and access management, audit trail logging, and method-guided weighing workflows. Full IQ/OQ/PQ validation documentation is available on request for pharmaceutical and regulated laboratory environments.
Can I get a UKAS calibration certificate with my microbalance?
Yes. UKAS-traceable calibration certificates are available on request for all microbalances in our range. Given the extreme sensitivity of microbalances, annual recalibration by a qualified service engineer is strongly recommended, along with routine daily verification using certified reference weights. Contact our team for calibration and service support.
