Magnetic levitation balance – ultra-high vacuum up to 150 bar
Description
The LINSEIS TGA L87 MSB magnetic suspension balance can be used for gravimetric measurements in a wide temperature and pressure range, as well as in aggressive media. Such a magnetic levitation balance consists of:
- a scale for recording the measured values
- a levitation clutch that transfers the weight of the sample to the balance without contact
- a sensor for determining the position of the levitation part and
- a control unit for controlling the levitation clutch
The contact-free transmission of the weight of the sample is realized by a levitating magnet and a holding magnet. The levitation magnet consists of a permanent magnet and the holding magnet consists of an electromagnet that is attached to the scale. This results in a vertically controlled structure. The position sensor provides the current position of the levitation magnet and the PID controller ensures a stable levitation position by means of the electromagnetic force control variable. This levitation clutch makes it possible to set up the microbalance under ambient conditions and thus protect it from high temperatures, pressures and aggressive media. This enables thermogravimetric measurements in a temperature and pressure range that would not be possible with a conventional device.
