Gravimetric Pre Weighed Cassettes :: Gravimetric Weighed Cassettes :: Air Sampling Cassettes - Preloaded :: Sampling Medias & Cassettes :: Zefon International, Inc.
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Zefon International, Inc. :: Sampling Medias & Cassettes :: Air Sampling Cassettes - Preloaded :: Gravimetric Weighed Cassettes :: Gravimetric Pre Weighed Cassettes

Gravimetric Pre Weighed Cassettes  
Gravimetric Pre Weighed Cassettes 
Printable version

Gravimetric analysis samples require filters to be weighed both before and after sampling to determine the amount of contaminate collected. Zefon pre-weighed cassettes eliminate the inconvenience of pre-weighing filters by providing the filter weight on each cassette prior to sampling.

Zefon begins the process of manufacturing pre-weighed cassettes by letting each filter equilibrate to the environmental conditions of 68° F and 50% relative humidity. Filters are then weighed using advanced microbalance equipment which records the weight. After reading the weight, filters are removed, placed into cassettes and sealed with a label bearing the weight and a unique serial number.

Features:
  • 2 or 3 piece housing
  • Preloaded, ready to use
  • Each cassette labeled with serial number
  • Color coded to indicate filter type
  • 5 Decimal weight accuracy (.00001g)
  • Use of Pure Homopolyer PVC filters provide excellent weight stability
  • PVC filters specially designed with no silica and low ash properties

Zefon 37mm Pre-Weighed Cassettes are available in the following configurations:

FILTER TYPE PURE HOMOPOLYMER PVC

PORE SIZE 5.0um 5.0um
HOUSING STYLE 3PC 37MM 2PC 37MM
WEIGHT TOLERANCE 10ug 10ug
COLOR CODE RED RED
PACK SIZE 50/BOX 50/BOX
PRODUCT NUMBER 7P53P 7P52P


Dr. Z Tips

Know what you are buying! All Zefon pre-weighed cassettes are weighed to a 5 decimal accuracy (e.g. .00001g). Some competitive brands are only weighed with a 4 decimal accuracy and are unacceptable for some applications.

Using Zefon pre-weighed cassettes does not comply with OSHA directives which require both the “tare weight” and “secondary weight” to be performed on the same microbalance and environmental conditions. If complying with this directive is a concern, match-weighed cassettes are a good alternative way to save time and still comply with the directive.

Environmental conditions can have a significant effect on filter weight readings. When using Zefon pre-weighed cassettes, it is important that the post sample weighing is performed under the same environmental conditions used at the Zefon factory. Those conditions are set at a temperature of 68° F (± 0.1°F) and a relative humidity of 50% (± 1%).



 
 
Details
 
Manufacturer Zefon International
U/M 50/Case
Stock Status Normally ships within 24 hours

Product Price Order

  37mm 2pc 5.0µm PVC Preweighed
  Product #: 7P52P

$190.00  

  37mm 3pc 5.0µm PVC Preweighed
  Product #: 7P53P

$190.00  

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All products and prices posted are valid for sale in the USA only
If you are not from the USA, CLICK HERE to locate
an Authorized Zefon Distributor in your area.
 

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