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DSC 204 F1 Phoenix® -
Application Example µSensor

 

 
New µ-Sensor Technique for DSC 204 F1 Phoenix®
 
Offering both outstanding sensitivity and excellent resolution simultaneously, the µ-Sensor guarantees comprehensive measurement results, especially if only a small sample mass is available. This newly developed sensor which works in a temperature range from -150 to 400°C is ideal for pharmaceuticals, biomaterials and foods.
 
For demonstrating the high signal-to-noise ratio of the new µ-Sensor, 0.27 mg of 4,4'-azoxyanisole were measured in a closed standard aluminum crucible at a heating rate of 1 K/min according to the sensitivity test in [1]. This substance shows two transitions: a large solid to liquid crystal transition at about 117°C and a much smaller liquid crystal to isotropic liquid transition at about 134°C. Fig. 1 illustrates the raw data with an endothermal peak of the second transition at 134.6°C with a peak height of 0.05 mW in comparison to a peak-to-peak noise of only 0.5 µW.
 
 
The high sensitivity and simultaneously excellent resolution of the µ-Sensor guarantees comprehensive measurement results even for diluted substances. Fig. 2 apart from the ice melting peak, a further peak at -1.7°C was detected for a 10% aqueous solution of a sugar alcohol. The presentation shows the enlarged scaling of this effect confirming the extremely low noise level (sample mass: 3.6 mg, heating rate: 1 K/min).
 

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NETZSCH offers instruments for thermal analysis, thermal properties measurement, thermal hazard screening, and contract testing services. Our portfolio is the world's broadest, including a full range of dilatometers to measure high accuracy thermal expansion, classical DSC & TGA, high temperature DSC to 1650°C for specific heat, very high temperature STA (TGA-DSC/DTA) from sub-ambient to 2400°, thermal / evolved gas analysis with fully-integrated FTIR & MS, high resolution TMA and DMA, plus DEA - dielectric analysis for thermoset cure monitoring. We also feature leading-edge technology for thermal conductivity by guarded hot plate and heat flow meters, laser flash thermal diffusivity measurement, thermal hazard screening via adiabatic reaction calorimetry, as well as refractories testing including HMOR, CIC, and RUL. Finally, we offer advanced software packages including thermokinetics for process modeling and development.

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Last update: 05/27/2009 , Copyright © 2000-2006 NETZSCH-Geraetebau GmbH