- Frequency range
1 mHz to 1 MHz, freely selectable values
- Data acquisition multiple DEA modules
True simultaneous operation of all channels
- Minimum data acquisition time
- Sensor connection
Shielded 4-wire technique (compensation of resistivity and capacity of the wire as a prerequisite for precise measurements)
- DEA modules
- Portable Version: All-purpose version, up to 7 channels
- Industrial Rack Version: up to 8 channels (extension possible for up to 16 channels)
- I/O Ports
- Input and output of measuring signals or signals from peripheral devices such as pressure or temperature sensors. DEA allows for triggering by manufacturing machines.
Comprehensive and Reliable
The measuring part of the software provides the user with a modern, user-friendly operating interface. Proteus® now offers a quick and convenient input assistant for programming all relevant measurement parameters. Color-coded tabs facilitate data entry and guarantee that no important parameter is forgotten — whether it relates to information about the sample, the temperature/time program or the desired frequencies. Very helpful is the ability to post-program (for frequencies or duration) during a running measurement, as well as the option of online evaluation (SNAPSHOT). The well-proven Proteus® software will ensure a comprehensive analysis.
The software offers these features, among others:
- DEA variables: ion viscosity, ion conductivity, loss factor, permittivity, tanδ as a function of time/temperature
- Multiple-window technique — clear presentation and evaluation of measurement data or graphical excerpts in multiple windows
- Multi-method plot — conjoint evaluation and presentation of, for example, DEA, DSC and DMA curves in a single graph for detailed material characterization
- Determination of characteristic values such as peak or extrapolated onset or endset, on a single curve or on a curve family
- Comparative analysis of up to 64 curves or segments from the same or different measurements
- Storage of the analysis results and status for later restoration and continuation with analysis
- Raw data preservation — original measurement data is always available
- Smoothing of the measuring curves with adjustable filter factors
- Data (ANSI, ASCII, csv) and graphic export (JPEG, BMP, EMF, PNG, TIFF)
One great advantage of DEA is the ability to use the same sample amount and geometry as is utilized in the real process. By applying the wide range of available sensors, almost any practical application can be reproduced:
- Spray coating of thin films
- Application by a drawdown bar
- Spreading of low- or medium viscosity materials
- Positioning of the sensor between the layers of a prepreg
- Dipping of the sensor in a liquid
In order to meet the requirements of a multitude of polymer processing applications, NETZSCH offers a great variety of dielectric sensors. These sensors can be classified as implantable or reusable. The latter type can be permanently mounted, for example, into a press, a mold or even into a sample holder for both DMA and rheometer.
With the easy-to-operate, collapsible lab furnace, it is possible to carry out heating, isothermal or cooling steps in the temperature range from -150°C to 400°C by using either two IDEX (or MS) sensors or a single TMS™ (or Monotrode) sensor.
Cooling can be realized via air compressor, Vortex tube (also air cooling), intracooler or liquid nitrogen (LN2).
The DEA 288 Ionic system supports the OmniCure S2000 UV lamp for studying light-induced reactions such as the UV curing of adhesives, inks or paints. The duration and intensity of the UV exposure are software-controlled (via NETZSCH Proteus®). Multiple shots can be triggered during each segment.
Laboratory tests on Sheet Molding Compounds (SMCs), Bulk Molding Compounds (BMCs) and prepregs can be performed in an environment mimicking processing conditions by using a lab press, which is able to apply heat and pressure to the sample at the same time.
The sample itself is either situated directly between the platens (including DEA sensor) or - optionally - in a separate spring mold, equipped with a Monotrode or a TMS™ sensor. The temperature program of the press can be controlled via the NETZSCH Proteus® software.
Application brochure: Material Characterization, Phase Changes, Thermal Conductivity, 24 pages
The modular concept of the new Dielectric Analyzer DEA 288 Epsilon by NETZSCH Analyzing & Testing allows for the study of the curing behavior of thermosetting resins and composites.
A variety of questions may arise during the curing process for thermosetting resins. At which temperature, or after how much time, does the resin begin curing? How high is the reactivity? When is curing complete? The White Paper focuses on cure monitoring by means of Dielectric Analysis (DEA).
Ultraviolet (UV) light curing is a technology being applied increasingly in the fields of paints, inks, coatings, sealants, adhesives and dental composites. The White Paper shows how a variety of questions regarding the curing process can be investigated by using Dielectric Analysis (DEA).