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).
NETZSCH offers
precision thermal analysis instruments including advanced dilatometers (with
a new basic R&D/QC dilatometer),
classical DSC & TGA (with
a new economical DSC), high temperature DSC
to 1650°C for specific heat, very high temperature STA
(TGA-DSC/DTA) to 2400°C (featuring the new STA
409-PC Luxx®), thermal
/ evolved gas analysis with fully-integrated FTIR & MS, plus
high resolution TMA and DMA.
We also feature leading technology for thermal conductivity and diffusivity measurement
as well as refractories testing including HMOR, CIC, and RUL.
