DSC PT 1000
very robust – highest precision sensor
This product was developed to provide a general purpose TM – DSC with a broad temperature range (-180 – 600°C) for all common applications. Furthermore emphasis was placed on an extremely stable baseline and high reproducibility. The design allows manual and automatic operation. The conception of the cell guarantees maximum mechanical and chemical resistance.
The key part of every DSC is the sensor, so don’t make any compromise. Up to now it has been impossible to achieve highest resolution and sensitivity in one sensor. The revolutionary design of the HiperRes® Sensor line now enables just that. The novel Ceramic/Metal Sensor deliver outstanding resolution in combination with superior reproducibility.
This permits the detection of smallest thermal effects. The metal-ceramic sensor structure ensures shortest possible time constants, permitting the separation of overlapping effects over the full temperature range. Unlike competing metal sensors the ceramic design does not oxidize and thus can be used ongoing over the full temperature range without aging effect.
|Model||DSC PT 1000*|
|Temperature range:||-180°C … 600°C|
|Heating rates:||0.01 K/min … 100 K/min|
|Cooling rates**:||0.01 K/min … 100 K/min|
|Sample Robot:||42 Positions|
*Specs depend on configurations
|Model||DSC PT1000 HiRes*|
|Temperature range:||-180°C … 750°C|
|Heating rates:||0.001 K/min … 300 K/min|
|Cooling rates**:||0.001 K/min … 300 K/min|
|Sensor:||heat flux & power compensation|
|Sample Robot:||84 Positions|
*Specs depend on configurations
- Different manual, semi-automatic and automatic Gas Control Boxes (with MFC)
- Broad range of crucibles made of gold, silver, platinum, aluminum, stainless steel (high pressure), etc.
- Standard sealing press and special high pressure crucible sealing press
- Liquid Nitrogen Cooling unit (-180°C)
- Selection of Intracoolers as alternative to liquid nitrogen cooling
- Sample robot with up to 84 positions
All thermo analytical devices of LINSEIS are PC controlled and the individual software modules exclusively run under Microsoft Windows operating systems. The complete software consists of 3 modules: temperature control, data acquisition and data evaluation. The Linseis 32 – bit software encounters all essential features for measurement preparation, execution and evaluation with a DSC run, just like with other thermo analytical experiments. Due to our specialists and application experts LINSEIS was able to develop this easy understandable and highly practical software.
- Temperature Modulated DSC
- Repetition measurements with minimum parameter input
- Evaluation of current measurement
- Curve comparison up to 32 curves
- Curve subtraction
- Multi-methods analysis (DSC TG, TMA, DIL, etc.)
- Zoom function
- 1. and 2. Derivative
- Multiple smoothing functions
- Complex peak evaluation
- Multipoint calibration for sample temperature
- Multipoint calibration for change of enthalpy
- Cp calibration for heat flow
- Storage and export of evaluations
- Program capable of text editing
- Export and import of data ASCII
- Data export to MS Excel
- Signal-steered measuring procedures
- Zoom in function
- Undo function
Applications example: Fructose, Glucose and Saccharose
The three evaluated substances (Fructose, Glucose and Saccharose) show distinctive melting points. These melting points can be precisely determined by means of Differential Scanning Calorimetry (DSC). For this the analytical method is frequently used for the determination of unknown substances. Even mixtures with identical molecular weight such as Fructose and Glucose can thus be recognized.
Applications example: Thermoplasts
PolyEthylenTherephtalat (PET) shows a significant endothermic glass point at about 76.9°C, which is quite special for partly crystalline thermoplasts. The relation between the exothermal cold crystallization at 131.0°C and the endothermic melting peak is a measure for the degree of crystallization of the material. In the case of (PET) the crystalline part is very small which results in a good transparency of the material.
Application example: OIT “Oxidative Induction Time”/ Temperatur
Initially the polyethylene sample is heated up to 200°C under argon atmosphere with a heating rate of 10K/min. After 3 minutes at the equilibrium the environment is changed from argon to oxygen. After an additional 5 minutes the exothermal oxidation of the sample starts.
Application example: Auto-ignition of cotton fibers
A sample of cotton fiber, containing inorganic minerals, was measured by DSC PT 1000 to determine the auto ignition temperature (ignition point) and heat of combustion of the cotton content. It is important to distinguish between the flash point and the ignition point. The flash point describes the temperature at which a substance is inflamed by means of an external ignition source, such as spark, while the auto ignition temperature is the temperature at which a substance inflames without an external ignition source.
The cotton mass sample was heated in the Linseis DSC PT 1000 from room temperature to 600°C at 10K/min. The results graph shows the heat flux signal (black curve) and the derivative of the signal (blue curve) as the cotton mass was heated. The cotton mass started to oxidize at 435.4°C and was completely combusted by 461.6°C. The total energy released by the combustion reaction of the cotton mass was 60J/g as calculated by the area of the heat flux peak using the Linseis evaluation software package.