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Designed to be different |
Engineered to be the best |
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MultiPerm NT.2002 On-line Porosity Measurement System
DescriptionPorosity measurement requires that a known air flow
rate be drawn through a known sheet cross sectional area with a known pressure
differential. The MultiPerm system performs this task by measuring the amount of
time required to draw a known volume of air through a known sheet area while
monitoring the pressure differential placed on the sheet.
In many respects it is similar to a Gurley laboratory porosity
measurement instrument. The measurement principle of the
MultiPerm
on-line porosity measurement system is an innovative development
invented by Value Systems in 1993 that supersedes prior technology used on
analogue systems. This principle recognises the importance of change in pressure
that occurs during measurement and that varies from grade to grade and from one
product type to another. Key Benefits
Basic System componentsThe MultiPerm system has three distinct components:
1)
a measurement sensor which contacts the sheet of paper providing a
specific area through which air is drawn for measurement, and a vacuum seal
about the measurement area to minimize leakage between the sensor and sheet.
The sensor is mounted on a pneumatic cylinder to insert/retract the
sensor from the sheet.
2)
a measurement cabinet which contains pneumatic valves, control
electronics, a measurement bellows to provide a know volumetric displacement, a
pressure sensor to measure the differential pressure placed on the sheet, and a
vacuum regulator to provide vacuum for the measurement sensor vacuum seal.
3)
an engineering workstation which directs the measurement cabinet to
perform its operations, and monitors signals from the cabinet to determine the
measurement cycle time and differential pressure.
Pricing and DeliveryPlease contact us for more details on pricing and delivery.
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Value Systems
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