All the latest in PFT news

FlowTube mouthpiece

  • ndd EasyOne FlowTube mouthpieces avoid cross-contamination between patients and reduce cleaning of the device to an absolute minimum.
  • The ndd EasyOne FlowTube mouthpieces have been engineered to fit perfectly into ndd’s EasyOne Air device to guarantee reliable and high quality measurement results.
  • The EasyOne FlowTube mouthpieces are single-use only and disposable.


  • Designed and precision manufactured by ndd
  • Single-patient use breathing tube effectively prevents cross-contamination
  • Ergonomic design for patient comfort
  • Easy handling for technicians
  • No expiration date
  • No special storage conditions
  • Climate neutral - Carbon emission during production and distribution is compensated by myclimate Carbon Reduction and Carbon Compensation program

What's in the box

  • 50 EasyOne FlowTube mouthpieces including a dispenser box
  • 200 EasyOne FlowTube mouthpieces including a dispenser box
  • 500 EasyOne FlowTube mouthpieces (dispenser box not included) Not available in the United States or Canada

Technical specifications


  • EasyOne FlowTube mouthpiece: Polypropylene (PP)
  • Bag: Polyethylene (PE)

Transport and storage information

  • Temperature range: -25 to 70°C (-13° to 158°F)
  • Relative humidity: 5 to 90%, non-condensing
  • Atmospheric pressure: 400 to 1060 hPa
  • No expiration date

Dimensions (H x W x D) and weight

  • Single FlowTube mouthpiece: 21 x 38 x 150 mm and 8 g (1.9 x 1.5 x 5.9 in and 0.3 oz)
  • Dispenser box: 19 x 23 x 19 cm (7.4 x 9 x 7.4 in)
  • Packaging box - 50 EasyOne FlowTube mouthpieces: 20 x 25 x 20 cm and 1 kg (12 x 15 x 23 in and 2.2 lb)
  • Packaging box - 200 EasyOne FlowTube mouthpieces: 25 x 39 x 39 cm and 3 kg (10 x 15 x 15 in and 6.6 lb)
  • Packaging box - 500 EasyOne FlowTube mouthpieces: 31 x 40 x 60 cm and 6.5 kg (12 x 16 x 24 in and 14.3 lb)

Downloads FlowTube mouthpiece

Please provide your location to see available downloads
Your location
Please provide your location to see available downloads
Your location

FAQs FlowTube mouthpiece

The ndd EasyOne FlowTube mouthpiece is a single-patient use product.

To avoid cross contamination, we recommend using ndd’s FlowTube only once. Washing / disinfecting the EasyOne FlowTube mouthpiece might damage sensitive parts, which may compromise test results and safe avoidance of cross contamination.

Assembling the filter and adapter components is simple and easy. To add a filter (2) to the EasyOne Air, insert the flow tube normally. Then attach the (1) filter adapter (FT), to the back of the flow tube and connect the filter to the filter adapter (FT), as shown in the diagram below. If you have questions about how to connect or use ndd filters, please contact ndd customer support in North America at [email protected] and internationally at [email protected].

As a crucial component of the TrueFlow technology, the measurement accuracy is also ensured by the ndd EasyOne FlowTube, which is precision-manufactured and undergoes stringent quality inspections. Therefore we highly recommend using the original ndd EasyOne FlowTube to fully benefit from the TrueFlow technology.


EasyOne<sup>®</sup> Air

Portable & PC spirometer

Get in touch
Request Info
Join the ndd family today.

Be the first to learn about special offers, product news, and industry updates!