Description
The PulmoGuard Filters are the original SDI barrier for pulmonary function testing. With a cross contamination efficiency of 99.999 percent, they address the infection risk that every forced exhalation carries into the instrument. Fifteen configurations cover the filter alone and kits with mouthpieces and noseclips in the pack sizes testing rooms actually use.
About These PFT Filters
During a pulmonary function test, bacteria and viruses can be expelled with real force, which puts both the next patient and the staff at risk. This filter line answers with pleated media that reaches 99.999 percent cross contamination efficiency while meeting ATS air resistance standards. Dead volume stays under 70 milliliters, so the filter adds almost nothing to the circuit the patient breathes through. The housing is transparent, which allows a complete visual inspection of the media before the filter goes on the instrument. The compact design fits most spirometers with no adapter, and the kit configurations add cardboard or Comfit mouthpieces and SDI noseclips in the same box.
Features and Benefits
Filtration Performance
- 99.999 percent efficiency – Cross contamination efficiency at this level is the headline figure pulmonary labs compare when they standardize a filter
- Pleated media – Pleating packs more filtration area into the housing, which supports high efficiency without high resistance
- Low dead volume – Less than 70 ml of dead space keeps the added circuit volume negligible for the patient
Handling and Fit
- Transparent housing – Staff can visually inspect 100 percent of the filter before use, with nothing hidden
- No adapter needed – The fitting suits most spirometers directly, which keeps setup to a single step
- Complete kits – Configurations with mouthpieces and noseclips make one box cover the full per patient setup
Product Specifications
Filter Details
- Cross Contamination Efficiency: 99.999 percent
- Air Resistance: 0.17 cm H2O per L/s
- Dead Volume: Less than 70 ml
- Media: Pleated
- Housing: Transparent for visual inspection
- Fit: Most spirometers, no adapter
- Country of Origin: Made in the USA
Configuration Details
- Filter Only: 29-7950 in 50, 100, 200 and 300 quantities
- With Cardboard Mouthpiece: 29-7951 and 29-7953 kits
- With The Klip: 29-7954 in 50 and 100 quantities
- With Comfit Mouthpiece: 29-7957 and 29-7958 kits
- With Kushion Klip: 29-7947 and 29-7948 kits
See all Professional Use Products Shop more SDI Diagnostics Products
Why Choose the PulmoGuard Filters?
This is the filter line SDI built its spirometry supply business on, and the specification sheet shows why. Documented efficiency, pleated media and a transparent housing make the quality check something staff can do by eye.
- Verified barrier – 99.999 percent cross contamination efficiency protects patients and staff on every test
- Inspection by eye – the transparent housing lets staff confirm media condition instantly, a differentiator over opaque filters
- Adapter free setup – fitting most spirometers directly keeps one less part in the testing room
- Kit completeness – mouthpiece and noseclip kits mean one box covers the whole patient setup
Frequently Asked Questions
What efficiency do these filters reach?
They reach 99.999 percent cross contamination efficiency, with air resistance of 0.17 cm H2O per L/s that meets ATS standards.
How much dead volume do they add?
Dead volume is less than 70 ml, so the filter adds very little to the breathing circuit during a test.
Do they need an adapter?
No adapter is needed for most spirometers. The fitting is designed to suit most instruments directly.
What do the kit configurations include?
Kits add a cardboard or Comfit disposable mouthpiece, and some add an SDI noseclip, The Klip or Kushion Klip, so one box covers the full per patient setup.
Is this the genuine SDI product?
Yes. These are genuine SDI Diagnostics filters under the 29-79xx part numbers shown in the specifications, made in the USA.
