Precision Beyond Compare
Sartorius has mastered the core disciplines of weighing like no other company. It is also setting benchmarks in mass metrology. In cooperation with the Bureau International des Poids et Mesures and the Institute for Process Measurement and Sensor Technology of the Technical University of Ilmenau, Sartorius has developed a mass comparator – the VMC1007 – that is capable of determining differences in mass to an accuracy of 0.1 μg for weights of 1 kg – even under high-vacuum conditions.
8-position loading device all of which can accommodate Si spheres
Can accommodate surface adsorption artefacts plus air buoyancy artefacts, leaving additional positions free for references, artefacts, spheres or test objects.
Best performance with highest precision to reach standard deviations of ~ 0.2 μg
All OIML weights from 100 g to 1 kg can be measured directly without any substitution plates due to new weight handler design
New direct handling device for the weights without any “stick-slip” effects during lifting and lowering
Measuring time is reduced due to smaller chamber design and faster measuring cycles
Applications for Vacuum Mass Comparators
Determination and Dissemination of Mass
As a 1 kg vacuum weighing system for the subdivision of the mass of the primary reference standards of National Metrology Institutes (NMIs) with national mass reference standards (prototype kilogram).
Dissemination of the mass scale of NMIs in the range of 1 kg to 1 mg; adapter plates are required for groups of weights and weights ≤ 50 g.
Determination of mass for international comparison measurements (key comparisons) and calibrations for national institutes, calibration laboratories and industry in accordance with the attainable measurement uncertainties specified in the CMC tables published by the BIPM.
Air Density Determination
Experimental determination of air density by comparison weighing of special buoyancy artifacts in air and under vacuum.
Avogadro Constant
Determination of the mass of 1 kg silicon spheres (also suitable within the scope of the Avogadro project for more accurate definition of the Avogadro constant and for new definition of the kilogram mass unit).
Research of Cleaning Procedures
Experimental research on the impact of cleaning procedures as well as on the effects that sorption and convection could have on mass and on the long-term stability of mass standards.
Mass Metrology Resources
Services for Mass Comparators
Keep your mass comparators at peak performance throughout their entire lifecycle with services carried out by engineers who work directly with the original design data, firmware, and parts.
- Installation and setup - On-site installation, leveling and initial startup - for reliable results from day one
- Maintenance & contracts - Preventive maintenance and service contracts at defined intervals to stay within specification, year after year
- Repair and spare parts - Manufacturer-backed repair with original Sartorius spare parts and verified performance