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SDI Diagnostics Type A Cardboard Tubes SDI Diagnostics Type A Cardboard Tubes

This is a bag of type A tubes for spacers, spirometers, and the MIR Smartone.

The dimensions for the opening are 28 mm inner and 30 mm outer

Our Price: $18.00
Accurette Sensor from SDI Diagnostics for Ndd Spirometers Accurette Sensor from SDI for Ndd Spirometers-50

This is a box of 50 Accurette Sensors from SDI Diagnostics. These are a direct replacement for the Ndd Spirettes. They are made in the USA and are individually-wrapped just like the Ndd Spirettes. They are not compatible with the latest Ndd Model, the AIR spirometer. That spirometer uses FlowTubes.

Identical Quality • Same Results • Better Price!

  • No adapters needed
  • No protocol changes
  • 100% visual inspection
  • same look
  • SAVE MONEY!
The spirometer pictured is not included.

Our Price: $75.00
PulmoGuard N Filters for Ndd Spirometers-Box of 50 PulmoGuard N Filters for Ndd Spirometers-Box of 50

PulmoGuard N™ Filters for ndd Spirometers. This a box of 50 and EA is individually Wrapped.

PulmoGuard IIDuring a Pulmonary Function Test, bacteria and viruses can be expelled, posing a serious risk to patients and health care workers alike. With a cross-contamination efficiency of 99.999%, Pulmoguard is safe, highly efficient…and very affordable. Insert the Filter into your Spirette, and you can perform 50 tests with a single Spirette. Once the test is over, simply discard the fitter.

PulmoGuard N™ Features

  • Meets ATS air resistance standards

  • Features dead volume of less than 70ml

  • Pleated media for better functionality

  • Compact, non-intimidating design

  • Transparent for easy, 100% visual inspection

  • Fits most spirometers with no adapter



List Price: $83.00
Our Price: $83.00
AstraGuard Spirometer Filters by SDI AstraGuard Spirometer Filters by SDI

Filter Spirometry Astraguard Bacterial/ Viral Transparent 50/Pk. 99.9% Bacterial and viral efficiency. Low resistance to air flow. Small, non-threatening size. Comfortable oval mouthpiece. Reduces risk of cross-contamination.
These filters fit the SDI Astra 100, 200, 300, AstraTouch, and Astra BT Spirometers. They are also individually wrapped. They are available in quantities of 50, 100, 200, or 300.

Our Price: $88.00
Sale Price: $88.00
SDI Filtrette for NDD Spirometers anti-viral SDI Filtrette for Ndd Spirometers-Box of 50

Would you like to use your Ndd Spirometer with a filter? The Filtrette will allow you to do just that. The Filtrette fits your Ndd Spiro just like a Spirette!

This is a box of 50 Filtrettes for use with all NDD spirometers except the AIR Spirometer. The Filtrette contains a filter that is housed behind the mouth opening, and it not simply a hollow tube. Protect your staff, equipment, and the testing area from bacteria and virus exposure with this Filtrette. In the picture the Filtrette it is on the right next to the Ndd Spirette.
The Filtrette incorporates a highly efficient single-patient filter that virtually eliminates cross-contamination from patient to patient and from patient to healthcare professional.

SPECIAL NOTE: The Filtrette is not compatible with the NDD AIR SPIROMETER.


The SDI Filtrette high-efficiency filtering system virtually eliminates cross-contamination in the test environment.
Mees all ATS standards • 99.99% bacterial and viral filtering.

Our Price: $90.00
Sale Price: $90.00
Plastic One-Way Valves for Peak Flow Meters and Spirometers-Box of 200 Plastic One-Way Valves for Peak Flow Meters and Spirometers-Box of 200

Safe-t-Chek Cardboard Mouthpiece

  • Very low air resistance
  • Smooth design ensures patient comfort
  • One-way valve ensures "infection protection"
Safe-t-Chek Plastic Mouthpiece
  • Same features as Cardboard Mouthpiece
  • Flexible plastic fits most instruments including Asthma Check and Personal Best Peak Flow Meters

Our Price: $108.00
Sale Price: $108.00
PulmoGuard II PFT Filter from SDI-Box of 50 PulmoGuard II PFT Filter from SDI-Box of 50

This a box of 50 individually-wrapped spirometry filters. There are two sides on this filter, and the ID (inside dimension) for the small side is 25.6 mm and OD (outside dimension) is 28.6 mm. The large side is 26.8mm ID and 29.8 mm OD.

The latest in PFT filters – fits most PFT devices without adapters.

PulmoGuard IIDuring a Pulmonary Function Test, bacteria and viruses can be expelled, posing a serious risk to patients and health care workers alike. With a cross-contamination efficiency of 99.999%, Pulmoguard is safe, highly efficient...and very affordable.

PulmoGuard II Features

  • Needs no adapter to fit many SDI spirometers
  • Fits many other PFT instruments with no adapter

PLUS these original PulmoGuard features:

  • Meets ATS air resistance standards
  • Features dead volume of less than 70ml
  • Pleated media for better functionality
  • Compact, non-intimidating design
  • Transparent for easy, 100% visual inspection

Our Price: $114.00
Sale Price: $114.00
SDI FloSense II for PB Spirometers FlowSense II Disposable Pneumotachs for PB Spirometers

SDI's easy-to-use flow sensors are ideal for both adult and pediatric patients. Why pay more when we provide the same quality and performance as other manufacturers specifications at a fraction of the cost.

Meets or exceeds all American Thoracic Society specifications

Won't affect manufacturer's warranty

Part Number: 29-8040-50

This a Box of 50. We have quantities of 100, 200, and 250 available as well.

Our Price: $130.00
Sale Price: $130.00
PulmoGuard C Filter for Collins and Welch-Allyn Spirometers-Box of 100 PulmoGuard C Filter for Collins and Welch-Allyn Spirometers-Box of 100

Note: Spirometry Equipment and PC in the pictures is not included

PulmoGuard C™ Filters (Alternate to Collins™ DC2)-Box of 100

PulmoGuard CDuring a Pulmonary Function Test, bacteria and viruses can be expelled, posing a serious risk to patients and health care workers alike. With a cross-contamination efficiency of 99.999%, Pulmoguard is safe, highly efficient…and very affordable.

PulmoGuard C Features

  • Meets ATS air resistance standards
  • Features dead volume of less than 70ml
  • Pleated media for better functionality
  • Compact, non-intimidating design
  • Transparent for easy, 100% visual inspection
  • Fits most spirometers with no adapter

pg features

Our Price: $138.00
Sale Price: $138.00
PG Air filter for NDD (29-3106-100) PulmoGuard AIR Filter for Ndd Air Spirometer

100 Disposable Spiro Filters with an adapter for the Ndd Air Spiro. Each filter is individually wrapped. The adapter plugs into the Ndd Flowtube and the adapter fits over the FlowTube mouthpiece.

Our Price: $161.00
Sale Price: $161.00
Smart Sense Mouthpieces for Midmark IQâ„¢ Spiro Smart Sense Mouthpieces for Midmark IQ™ Spiro

The low-cost alternative to Midmark Spiro Mouthpieces! It just makes sense. SDI's easy-to-use mouthpieces are ideal for both adult and pediatric patients. Why pay more when we provide the same quality and performance as other manufacturer's specifications at a fraction of the cost. Meets or exceeds all American Thoracic Society specifications, and is substantially equivalent to the MidMark IQ Mouthpiece™. These mouthpieces are available in quantities of 100 or 300.

List Price: $230.00
Our Price: $190.00
Sale Price: $190.00
Savings: $40.00
PulmoGuard IQ Filters for MidMark Spirometers-Box of 100 PulmoGuard IQ Filters for MidMark Spirometers-Box of 100

Includes 100 PulmoGuard Filters (individually wrapped) and 4 SmartSense Filters. The IQ filter fits inside your existing Midmark or SDI Mouthpiece (see picture below on right).
During a Pulmonary Function Test, bacteria and viruses can be expelled, posing a serious risk to patients and health care workers alike. With a cross-contamination efficiency of 99.999%, Pulmoguard is safe, highly efficient…and very affordable.

PulmoGuard IQ Features

  • Meets ATS air resistance standards
  • Features dead volume of less than 70ml
  • Pleated media for better functionality
  • Compact, non-intimidating design
  • Transparent for easy, 100% visual inspection
  • Fits most spirometers with no adapter
pg iq with filter


Our Price: $190.00
Sale Price: $190.00
PulmoGuard Spiro Filter from SDI Diagnostics-Box of 100 PulmoGuard Spiro Filter from SDI Diagnostics-Box of 100

The original leader in PFT filters

PulmoGuardDuring a Pulmonary Function Test, bacteria and viruses can be expelled, posing a serious risk to patients and health care workers alike. With a cross-contamination efficiency of 99.999%, PulmoGuard is safe, highly efficient, and very affordable. This is a box of 100 individually-wrapped filters.

PulmoGuard Features

  • Fits many spirometers with no adapter
  • Meets ATS air resistance standards
  • Features dead volume of less than 70ml
  • Pleated media for better functionality
  • Compact, non-intimidating design
  • Transparent for easy, 100% visual inspection

  • Instrument Compatibility
  • Cybermedics -Spinnaker TL, SL, CM3, CM310 (if white or black cone use 7980)

Cybermedics - Moose
Godart - All Models
Gould - 5004
Healthscan - Assess Peak Flow Meter
Jaeger - All Models except Spiro Pro
Jones - All Models except Satellite (small end of filter)
Med Science - 570, 6257
Med Science - 3000, 4000 (spirometry-no adapt./vol-7961/diff-7960B)
Med Systems - Spirolite 101 & 201 (small end of filter), 343
New Med - 7000 I (Spirobyte)
PK Morgan - Benchmark (spirometry-7978, vol&diff-7960B), Flexi Flow (small end of filter), Trans Flow
Pneumedics - All Models (small end of filter)
Riko - AS300
S&M - CF-150B, GS520, Keystone III, Portascreen, Pulmoscreen
ViaSys/Sensormedics - Horizon, Ohio, 922, 2130, 2200, 2400, 2450, 2800, 6200, 2100 (spirometry-7961, vol-7960B, diff-7960B), Vmax (can use PGII w/7976 or 7977)
Spirolink - All Models
Spirometrics - LTE, 2500 LTE
Spiroscreen - All Models (small end of filter)
Spirotech - All Models
Tamarac - All Models except Presto Flash

List Price: $225.84
Our Price: $198.00
Sale Price: $198.00
Savings: $27.84
PulmoGuard II PFT Filter-Box of 100 PulmoGuard II PFT Filter-Box of 100

This a box of 100 individually-wrapped spirometry filters. There are two sides on this filter, and the ID (inside dimension) for the small side is 25.6 mm and OD (outside dimension) is 28.6 mm. The large side is 26.8mm ID and 29.8 mm OD.

The latest in PFT filters – fits most PFT devices without adapters.

PulmoGuard IIDuring a Pulmonary Function Test, bacteria and viruses can be expelled, posing a serious risk to patients and health care workers alike. With a cross-contamination efficiency of 99.999%, Pulmoguard is safe, highly efficient...and very affordable.

PulmoGuard II Features

  • Needs no adapter to fit many SDI spirometers
  • Fits many other PFT instruments with no adapter

PLUS these original PulmoGuard features:

  • Meets ATS air resistance standards
  • Features dead volume of less than 70ml
  • Pleated media for better functionality
  • Compact, non-intimidating design
  • Transparent for easy, 100% visual inspection

Our Price: $214.00
Sale Price: $214.00
Accurette Sensor from SDI Diagnostics for Ndd Spirometers Accurette Sensor from SDI for Ndd Spirometers-200

This is a case of 200 Accurette Sensors from SDI Diagnostics. These are a direct replacement for the Ndd Spirettes. Your order will include a dispensor pack of 50 sensors. They are made in the USA and are individually-wrapped just like the Ndd Spirettes. They are not compatible with the latest Ndd Model, the AIR spirometer. The AIR spirometer uses FlowTubes.

Identical Quality • Same Results • Better Price!

  • No adapters needed
  • No protocol changes
  • 100% visual inspection
  • same look
  • SAVE MONEY!
The spirometer pictured is not included.

Our Price: $230.00
Sale Price: $230.00
SDI Filtrette for NDD Spirometers anti-viral SDI Filtrette for Ndd Spirometers-Case of 200

Would you like to use your Ndd Spirometer with a filter? The Filtrette will allow you to do just that. The Filtrette fits your Ndd Spiro just like a Spirette!

This is a box of 200 Filtrettes for use with all NDD spirometers except the AIR Spirometer. The Filtrette contains a filter that is housed behind the mouth opening, and it not simply a hollow tube. Protect your staff, equipment, and the testing area from bacteria and virus exposure with this Filtrette. In the picture the Filtrette it is on the right next to the Ndd Spirette.
The Filtrette incorporates a highly efficient single-patient filter that virtually eliminates cross-contamination from patient to patient and from patient to healthcare professional.

SPECIAL NOTE: The Filtrette is not compatible with the NDD AIR SPIROMETER.


The SDI Filtrette high-efficiency filtering system virtually eliminates cross-contamination in the test environment.
Mees all ATS standards • 99.99% bacterial and viral filtering.

List Price: $340.71
Our Price: $314.00
Sale Price: $314.00
Savings: $26.71