Accurately determining the mass of lightweight samples is very important in many fields of research. In order to accomplish this, high-resolution analytical balances are an integral piece of equipment. Additionally, many technically relevant processes occur under technically demanding conditions such as high pressure, extreme temperatures, and aggressive or toxic atmospheres. Commercially available analytical balances cannot be used under these conditions. Therefore, the technology of the Magnetic Suspension Balance has been developed. RuboSORP´s Magnetic Suspension Balance technology offers the unique possibility of high-quality analysis under even the most extreme metrological conditions.

Measurement Technology

Magnetic Suspension Balance technology allows high resolution mass determination under extreme conditions. An industrial microbalance is located outside the cell. Thanks to contactless magnetic suspension coupling, mass changes within the pressurized cell can be determined. When perfroming a measurement, the sample whose mass change is being measured is attached to a permanent magnet. The actual position is detected and controlled via a high-performance PID controller. In order to establish a free levitation position for permanent magnet and measurement object, voltage is applied to a electromagnet outside of the measurement cell. This allows the sample mass to be measured contact free under extrem conditions. Load decoupling allows the object weight being measured to be substracted for taring or calibrating the measurement signal. In this case, only the permanent magnet remains in levitation position (zero-point position). When measuring point is selected, the measurement object is liftet, corresponding weight is detected by the microbalance. The measurement objects can be a crucible, containing sample material, for example being used to measure adsorption isotherms or catalytic reactions. In addition, the measurement object could also be sinker with calibrated volume for high accurate density measurement of the sinker surrounding fluid. The RuboSORP Magnetic Suspension Balance is an advanced technology for measuring the mass of two measurement objects at the same time.

Availabe Versions

The unique technology ensures measurements within a pressure range of up to 700 bar and a maximum temperature of 400°C. The measurement cell and all components in fluid contact are resistant to aggressive and toxic atmospheres. Due to this, a variety of different fluids can be used, e.g. inertgas, aggressive and toxic gases, supercritical fluids, flammable and explodable gases, gas mixtures and vapor.