Filtrette System
  • Fits all ndd Spirometers that use ndd Spirettes.
  • Virtually eliminates cross-contamination
  • Infection protection for you & your patient
  • Meets all ATS/ERS standards


SDI’s Filtrette is the new, LOW COST alternative to the ndd® Spirette™. This mouthpiece provides virtually perfect infection protection for spirometry testing.

The Filtrette incorporates a highly efficient single-patient filter that virtually eliminates cross-contamination from patient to patient and from patient to healthcare professional.

The one-time-use Filtrette provides a bacterial/viral filter with nearly complete infection protection.

Using the Filtrette will not affect your spirometer warranty.

New Filtrette

Filtrette™ Features

  • Lower cost
  • Provides 99.9% bacterial and viral efficiency*
  • Reduces risk of cross-contamination for patients and health care professionals
  • Decreases time spent disinfecting equipment
  • Offers low resistance to air flow
  • Features small, non-threatening size
  • Has a comfortable oval mouthpiece
  • Exceeds all ATS ERS standards for spirometry



Contact Information


SDI Diagnostics
Ten Hampden Drive
Easton, Massachusetts 02375
Phone: (800) 678-5782
Fax: (508) 230-2752 

SDI Diagnostics