Fluid-PermCell NW50-liquid
Übersicht
The Fluid-PermCell NW50-liquid is offered as a complete workstation. It is used for the determination of the chemical permeation of liquid or gaseous test chemicals with a continuous contact to the protective clothing or protective glove material sample in the liquid collection medium deionised water according to EN 16523-1:2015, EN16523-2:2015 (replaced EN 374-3) and DIN ISO EN 6529.
Advantages of the Fluid-PermCell NW50-liquid
Advantages of the Fluid-PermCell NW50-liquid
The permeation cell Fluid-PermCell NW50-liquid is offered as a complete workstation. It is used for the determination of the chemical permeation of liquid or gaseous test chemicals with a continuous contact to the protective clothing or protective glove material sample in the liquid collection medium deionised water according to EN 16523-1:2015, EN16523-2:2015 (replaced EN 374-3) and DIN ISO EN 6529.
- Determination of chemical resistance according to standards: DIN EN ISO 374, DIN EN ISO 16523, DIN EN ISO 6529 and F-739
- LABC permeation cell developed and built in compliance with the standards DIN EN ISO 374, DIN EN ISO 16523, DIN EN ISO 6529 and F-739
- For PPE test at 23°C+-1 according to standard and further tests up to 35°C
- Economical consumption of permeation chemicals, as LABC permeation cells are used in an upright position. Approx. 10ml of liquid is required per permeation measurement
- Gaseous permeation chemicals can also be measured with a separate attachment
- Our permeation products are used worldwide
- LABC permeation cells and permeation testers are exclusively manufactured in Germany
- On request, we develop and produce permeation test chambers according to customer requirements as special designs
- The permeation test equipment required for each permeation chemical is listed in the normative annexes
LABC-Labortechnik has developed various products for permeation measurement in laboratories since 1988. Our offer includes products for measurements in the collection medium water as well as in the gas flow. As detectors we offer FPD, FID, PID electrodes, as well as pH electrodes, conductivity electrodes and redox electrodes.
The informative annex to standards 374 and 16523 lists permeation chemicals and the preferred analyzer. We have assigned our suitable test device to each test chemical according to the standard.
Measuring devices in gas flow
Qumat®-Q401-EPC and the PERMOBIL mobile permeation test stand analyze in gas flow with one detector. This means that the collection medium is a gas. Here you have the option of using air or nitrogen. The measurements in the gas flow are carried out in an open loop system.
Workplace with liquid collection medium
We have developed the Fluid-PermCell NW50-liquid for liquid collection media. The collection medium is predominantly deionized water. The permeation measurements take place in a closed loop system.
Fluid-PermCell NW50-liquid
Fluid-PermCell NW50-liquid
Structure of the permeation cell
The film sample to be tested is located in the PTFE clamping device. The clamping device of the permeation cell Fluid-PermCell NW50-liquid is also referred to as the sample holder and is compatible with the permeation cell NW50 for gaseous collection media. The glass parts of the Fluid-PermCell NW50-liquid are made of laboratory glass with a tempering jacket. The sample holder with the test sample separates the permeation chemical from the collection medium during continuous contact. The lower part of the cell is completely filled with the collection medium and also has full contact with the test sample. This structure is fixed in a tripod holder with a few simple steps. For quick disassembly and assembly, the temperature control hoses are equipped with quick couplings including shut-off valves. The permeation cell is upright, saving test chemicals and reducing waste. According to EN 16523-1, the lid does not have to be completely filled with the permeation chemical, it is sufficient if the sample is completely wetted. This is a significant advantage of the Fluid-PermCell NW50-liquid over other cells listed in the standards. Deionized water is predominantly used as the collection medium.
"Closed Loop"
In the lower part of the cell, deionized water is usually used as the collection medium. “Closed loop” means that testing is done in a closed circuit. The deionized water remains in the cell for the entire test cycle and is disposed of at the end of the permeation test. The advantage of the “closed loop” is that resources are saved. The collection medium is used for the entire experiment; in the open circuit or “open loop” it is fed into the cell and discharged on the other side. Cells with “Open Loop” are outlined as attachments to the standard, but do not provide any benefits. The collection medium is continuously agitated to ensure that there is a constant concentration and temperature distribution in the collection medium. A 2MAG magnetic stirrer is supplied to match the stand of the permeation cell; it fits exactly under the cell so that stirring can be carried out using magnetic stir bars. Compared to other example cells in the relevant standards, in the case of the Fluid-PermCell NW50-liquid the collection medium is not pumped in a closed circuit or moved externally with an agitator. This makes the permeation cell much more compact and can be easily set up in different locations in the laboratory.
Temperature control
Both the upper and lower parts of the cell have a temperature control jacket through which a temperature control liquid flows continuously. For temperature control we recommend the PT31 circulator from A.KRÜSS Optronic GmbH. The thermostat with Peltier technology can temper the Fluid-PermCell NW50-liquid in a tempering range of 8 to -35 °C with a tempering accuracy of ±0.2 °C. This allows constant temperature control of up to three Fluid-PermCell NW50-liquid according to the standards EN 16523-1:2015, EN16523-2:2015 (replaced EN 374-3) and DIN ISO EN 6529 of 23°C +-1 during the entire test procedure.
Continuous measurement with data logger
The measurement takes place directly and continuously in the collection medium. Sampling during the permeation test is not necessary. The measuring electrode is immersed directly in the collection medium via a sealing GL25 fitting. The EN 16523-1:2015, EN16523-2:2015 (replaces EN 374-3) and DIN ISO EN 6529 standards recommend sensors for pH, ORP and conductivity measurement. LABC-Labortechnik recommends a WTW multimeter as the data logger in the Fluid-PermCell NW50-liquid workstation. It has three measurement lines so that up to three permeation cells can be monitored simultaneously. The electrode continuously monitors the permeation test and incidentally records the temperature. The multimeter can be easily connected to the PC with a USB cable and writes the data directly into Excel with the included PlugIn. In addition, the caching of data on a USB stick is possible. The display also shows the values. A transfer of the data into a permeation curve for evaluation is possible without any problems.
The handling of the Fluid-PermCell NW50-liquid is described in the operating instructions for both the individual workstation and the workstation with 3 cells.
