Radwag Microbalances – Microgram Precision for Advanced Laboratory & Pharmaceutical Applications
Radwag microbalances are high-precision weighing instruments designed for accurate measurement at the microgram level, achieving readability of 0.001 mg (1 μg) for applications where conventional analytical balances cannot provide sufficient resolution. Manufactured in Poland by Radwag — one of Europe’s leading precision weighing instrument manufacturers and a recognised specialist in high-accuracy mass measurement — their microbalance range combines electromagnetic force restoration (EMFR) weighing technology with advanced environmental compensation and vibration isolation to deliver stable, repeatable microgram measurements in real-world laboratory conditions.
Radwag microbalances are used in pharmaceutical impurity testing, trace substance analysis, filter weighing for environmental monitoring, thin film characterisation, and any application where sample masses are in the low microgram range and conventional analytical balance resolution is insufficient. At 1 μg readability, environmental factors including temperature fluctuations, air currents, vibration, and electrostatic charge become significant sources of measurement uncertainty. Radwag microbalances address these challenges through built-in environmental sensors, anti-static ionisers, anti-vibration systems, and fully enclosed draft chambers — providing the stable measurement environment needed to achieve reliable microgram-level results in practice. GLP-compliant output with full traceability documentation supports use in regulated pharmaceutical, ISO 17025, and GMP environments.
Key Features
- Readability of 0.001 mg (1 μg) for microgram-level precision in advanced laboratory applications
- Electromagnetic force restoration (EMFR) technology for high accuracy and linearity
- Anti-vibration system for stable readings in real-world laboratory environments
- Fully enclosed draft chamber to eliminate air current interference at microgram resolution
- Anti-static ioniser to neutralise electrostatic charge on samples and containers
- Automatic internal calibration with motorised reference weights for continuous accuracy
- GLP and ISO 17025 compliant output with full measurement traceability documentation
- RS-232, USB, and Ethernet connectivity for LIMS and laboratory software integration
Common Applications
- Pharmaceutical impurity testing — microgram weighing of reference standards and trace impurities for ICH guidelines
- Filter weighing — gravimetric determination of particulate matter on filters for environmental and industrial monitoring
- Thin film and coating analysis — mass measurement of deposited films and surface coatings
- Trace substance analysis — gravimetric quantification of trace components in complex matrices
- Weight calibration — calibration of OIML Class E1 and E2 reference weights
- Materials science research — precise mass measurement for advanced materials characterisation
All Radwag microbalances are available with UKAS-traceable calibration certificates on request. Contact our technical team for advice on the right model for your application, environmental requirements, and accuracy class.
Frequently Asked Questions
What is the difference between a microbalance and an analytical balance?
An analytical balance offers readability of 0.1 mg (0.0001 g). A microbalance achieves readability of 0.001 mg (1 μg) — 100 times more sensitive. At this resolution, environmental control and sample handling technique become critical factors in achieving reliable results. Microbalances are used only where this level of resolution is genuinely required by the application — such as pharmaceutical impurity testing, filter weighing, and trace analysis.
What environmental conditions are required for a Radwag microbalance?
Microbalances require a stable, vibration-free environment with controlled temperature and humidity, and minimal air movement. A dedicated laboratory bench away from HVAC outlets, doors, and foot traffic is strongly recommended. Radwag microbalances include built-in environmental sensors, anti-vibration systems, and fully enclosed draft chambers to maximise performance in real-world conditions, but the quality of the installation environment remains a significant factor in achievable measurement uncertainty.
Are Radwag microbalances suitable for pharmaceutical impurity testing?
Yes. Radwag microbalances are widely used for pharmaceutical impurity testing in accordance with ICH Q3A/Q3B guidelines, where reference standards must be weighed at microgram quantities. GLP-compliant output, user management, audit trail, and 21 CFR Part 11 compliant data integrity features are available on selected models for regulated pharmaceutical environments. Contact our team for guidance on the appropriate model for your regulatory requirements.
How should samples be handled when using a microbalance?
Always use tweezers, gloves, or non-contact handling tools — never bare hands. Allow samples to equilibrate to room temperature before weighing. Use the anti-static ioniser to neutralise electrostatic charge. Close all draft chamber doors before taking a reading and allow the reading to stabilise fully before recording.
Are UKAS calibration certificates available?
Yes. UKAS-traceable calibration certificates are available on request for all Radwag microbalances. Contact our team when ordering to arrange appropriate calibration documentation for your application and accreditation requirements.
