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Filters


MTL's PTFE filter is engineered by metrologists for accurate gravimetric analysis. The PTFE membrane and hydro-inert support ring are less susceptible to moisture fluctuation than other alternatives.

PTFE Filters for EPA PM 2.5 Reference Method (Item #: PT47):

Conform to the requirements of 40 CFR Part 50, Appendix L.

  • Pre-marked with 2D machine-readable Data Matrix Code Serial Number (both sides) (Item #: PT47DMC)
  • OPTIONAL: Pre-marked with sequential alpha-numeric human readable serial number (both sides) (Item #: PT47AN)
  • OPTIONAL: Alpha Numeric & Data Matrix Serial Number on both sides (Item #: PT47DMCAN)
  • OPTIONAL: Blank filter with no identification (Item #: PT47P)
  • 46.2mm diameter
  • Patented filter identification: 2D machine-readable data matrix barcode enhances data quality control, simplifies filter identification, and facilitates chain of custody tracking.

    Minimum order is 50 filters.


    GP47

    PTFE Coated Boro Silicate Glass Fiber Substrate

  • Pre-marked with 2D machine-readable Data Matrix Code Serial Number (both sides) (Item #: GP47DMC)
  • OPTIONAL: Pre-marked with sequential alpha-numeric human readable serial number (both sides) (Item #: GP47AN)
  • OPTIONAL: Alpha Numeric & Data Matrix Serial Number (both sides) (Item #: GP47DMCAN)
  • OPTIONAL: Blank filter with no identification (Item #: GP47P)
  • 46.2mm diameter
  • Patented filter identification: 2D machine-readable data matrix barcode enhances data quality control, simplifies filter identification, and facilitates chain of custody tracking.

    Minimum order is 50 filters.


    QM-A

    Quartz Filter

  • Pre-marked with 2D machine-readable Data Matrix Code Serial Number (both sides)
  • OPTIONAL: Pre-marked with sequential alpha-numeric human readable serial number (both sides)
  • OPTIONAL: Alpha Numeric & Data Matrix Serial Number (both sides)
  • OPTIONAL: Blank filter with no identification
  • 46.2mm diameter;
  • Patented filter identification: 2D machine-readable data matrix barcode enhances data quality control, simplifies filter identification, and facilitates chain of custody tracking.

    Available in packages of 50 filters (Minimum order is 50)

    Sampling membranes are available in the following dimensions: 47mm, 90mm, and 150mm


    Filter Storage Container

    Stainless Steel Filter Dishes

    Many laboratories store filters in glass Petri dishes. While such a practice may seem convenient, it can actually have an adverse affect on weighing results. While PTFE is one of the most electronegative materials on the Triboelectric scale, glass is electropositive. The result is a transfer of electrons to the PTFE, causing electrostatic charge problems. MTL has developed a stainless steel storage dish for use in the laboratory to minimize such problems. The dishes have a slot cut into the side to allow for environmental equilibration and to enable a pair of tweezers to easily reach the filter. The dishes are cleanable and stackable, allowing a laboratory to use space more effectively.


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