3. Measurement and sensor
Since the aim is to determine the variable mass of the sample, the measuring device must be capable of continuously recording a mass indication. Conventional balances are not suitable for this purpose; special instruments have been designed specifically for this type of application. In particular, great care must be taken to maintain a stable measurement throughout the experiment. Unlike a conventional balance, the time scale of the measurement can exceed several hours.
3.1 Balance
Most balances on the market (figure 1 ) are based on a beam or parallelogram mechanism operating on the basis of a zero method, i.e. the position of the moving part is servo-controlled...
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Measurement and sensor
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