Description
To the point
The LINSEIS STA PT 1000 top-loading thermobalance consists of a digital balance and a sample holder with integrated thermocouple.
The thermobalance enables the measurement of samples with a weight of 5 or 10g (including measuring system).
The specially developed oven enables fast heating and cooling rates as well as highly accurate temperature control.
A variety of sample carriers (TG, TG-DTA and TG-DSC) and sample crucibles ensure optimum measuring conditions for every application.
Special features:
- Top pan submicrogram scale
- Temperature range RT to 1000°C
- Interchangeable measuring system TG – DTA/DSC
- Optional sample robot with up to 90 positions
Optional MS (quadrupole mass spectrometer) and/or FTIR (Fourier transform infrared spectrometer) coupling is possible at any time.
Unique features
Accessories starter kit
Optional sample robot
Large temperature range
Shielded DTA
for corrosive
applications
Moisture &
Water vapor
Vacuum and
controlled atmosphere
Automatic evacuation
and calibration
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Specifications
MODEL | STA PT 1000 |
|---|---|
| Temperature range: | RT up to 1000°C |
| Vacuum: | 10-2 mbar (for operation below 800°C) |
| Heating speed: | 0.01 up to 100K/min |
| Temperature precision: | 0.001°C |
| Sample robot: | Optional 42 / 90 |
TG | |
|---|---|
| Resolution: | 0.1 μg |
| Sample weight: | The balance can recognize the weight automatically |
| Measuring range: | 25 / 2500 mg |
DSC | |
|---|---|
| DSC sensors: | E /K / S |
| DSC resolution: | 0.3 / 0.4 / 1 μW |
| Calorimetry sensitivity: | ca. 4 / 6 / 17.6 μW |
DTA | |
|---|---|
| DTA resolution: | 0.03 nV |
| Sensitivity: | 1.5 μV / mW |
| DTA measuring ranges: | 250 7 2500 μV |
MODEL | STA PT 1000 HIRES |
|---|---|
| Temperature range: | RT up to 1000°C |
| Sample weight: | up to 5 g |
| Resolution: | 0.01 ug |
| Measuring system: | E/K/S |
| Vacuum: | 10E-2 mbar |
| Cooling rate: | < 15min (1000°C - 100°C) |
Sensors:TG-DTA TG-DSC TG-DSC (Cp) | |
Options: | |
| DTA - Calc.: | optional |
| Gas control: | optional |
| Sample robot: | 90 positions |
Sensors
- Calculated DTA software
- Various gas boxes: manual, semi-automatic and MFC controlled
- Variety of crucibles (gold, silver, platinum, aluminum, Al2O3, graphite, tungsten, stainless steel (high pressure), etc.)
- Various rotary pumps
- Sample robots with up to 90 positions
Software
Making values visible and comparable
The powerful LINSEIS thermal analysis software, which is based on Microsoft® Windows®, performs the most important function in the preparation, execution and evaluation of thermoanalytical experiments, in addition to the hardware used.
With this software package, Linseis offers a comprehensive solution for programming all device-specific settings and control functions, as well as for data storage and evaluation.
The package was developed by our in-house software specialists and application experts and has been tried and tested over many years.
General functions
- Real-time color display
- Multi-method analysis (DSC TG, TMA, DIL, etc.)
- Program for text editing
- Automatic and manual scaling
- Repeat measurements with minimal parameter input
- Display of the axes freely selectable (e.g. temperature
e.g. temperature (x-axis) against delta L (y-axis)) - Mathematical calculations (e.g. first and second derivatives)
- Saving complete evaluations
- Multitasking function
- Multi-user function
- Zoom function for curve sections
- Curve comparison with up to 50 curves
- Online Help Menu
- Free labeling
- ASCII import of data
- EXCEL® and ASCII export of measurement data
- Storage of evaluations
- Evaluation of the current measurement
- Data smoothing
- Zero curves are offset
- Cursor function
- Statistical curve evaluation (mean value curve with confidence interval)
- Repeat measurements with minimal parameter input
- Tabular printout of the data and expansion coefficients
- Calculation of Alpha Phys, Alpha Tech, relative expansion L/L0
- Curve arithmetic, addition, subtraction, multiplication
- Programmable gas control
- Data security in the event of a power failure
- Protection against thermocouple breakage
- Statistical evaluation package
- Automatic calibration
- Optional kinetics and service life prediction
- Software packages
TG properties:
- Relative (%) and absolute (mg/ug) mass change
- Evaluation of the mass change
- Residual mass determination
- 1st and 2nd derivative (peak temperature of the mass change)
- “How to dynamic rate TGA measurement” (optional service for a fee)
HDSC features:
- Complete glass transition determination
- Specific heat (Cp) determination
- Multible measuring / melting points for temperature calibration
- Peak flat / enthalpy determination (various baseline types)
- Enthalpy determination taking into account the change in mass
- Determination of onset, peak, inflection point and final temperature
Applications
Application example: Decomposition of rubber
This measurement of an industrial rubber sample was carried out with a simultaneous thermal analyzer STA PT 1000, starting at nitrogen atmosphere. The sample was heated in three steps with each 30 K/min. The blue curve shows the relative weight loss. In a first weight loss step, the dehydration of the sample takes place. The amount of water was 9.3 %. The corresponding DTA signal (purple curve) did not show any effect during the evaporation of water.
In the second reaction step, the volatile components are released by pyrolysis un- der N2 atmosphere. The amount of these components is 36.0%. Their release can be identified by an exdothermic reaction peak on the DTA curve. For the third reaction step, the atmosphere is changed to O2, leading to a burn off of the remaining carbon. The loss in weight is 14.3 %. The remaining 40.4 % are inorganic components like ashes, slake or fillers.
Application example: Aspirin
In this application acetylsalycylic acid (Aspirin) was measured by STA PT 1000 with focus on the DSC-signal.
By DSC, decomposition reactions can be observed and substances such as pharmaceuticals compounds can be investigated and identified. The measured ASS sample shows the following effects:
At the beginning of the heating process, some adsorbed water is released, resulting in a weight loss of about 1 %.
At 140°C the melting point of the aspirin is reached, resulting in an endothermic reaction, measured on the DTA trace.
At 60°C, decomposition of the molten drug takes place in several stages.
The decomposition products are volatile, resulting in a total weight loss of almost 100 %.
Well informed
