JDC Skywatch Porosimeter (MK1-JDC) Measure the Porosity of Fabrics
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JDC Skywatch MK1 Porosimeter, to measure the porosity of fabrics.
The JDC Skywatch MK1 Porosimeter is an easy-to-use, reliable, and very
precise porosimeter to measure the porosity of fabrics that is now used and
appreciated world wide. The porosity can be calculated by measuring the time it
takes for 0.25 liters of air under 10mbar pressure to go through 38.5 cm2 of
cloth. The result is given in seconds and can vary from a few seconds (coating
very degraded), to more than 1000 seconds for the finest current fabrics. The
MK2 is frequently used by cloth manufacturers, free flight schools/shops,
paragliding and hang-gliding manufacturer, ballooning, and paper manufacturers.
- Quick test of cloth porosity used in paragliding, spinnaker sails, and
hot air balloons
- Measure cloth degradation in wings and sails for safety reasons
- Evaluation of the present and resale value of second-hand paragliders
- Laboratory study of cloth wear (coating adherence, etc.)
- Time Display
- Cable to connect porosimeter to time display
- Approximate dimension: 8 pounds,7 x 7 x 10 inches
- Powered by 2 AA batteries
- Two year warranty
The measuring pressure of the MK1 is 100 mm of water (10 mbar or 10 hPa).
Result is given in seconds (necessary time for 0.25 liter of air to go through
38.5 cm2 of fabric under a pressure of 10 mbar.
|Industry standard #1 (liter per m2 per min) (pressure of 200 mm of
= 5400 / time displayed on the MK1
|Industry standard #2 (cm3 per cm2 per sec) (pressure of 200 mm of
= 9 / time displayed on the MK1
Accuracy - factory gauged for a repeatability of +/-2% with a 0.3 mm diameter
reference hole. Repeatability with cloth is not as good as specified because it
depends a lot on its setting (position, traction, folds, etc).
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