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Spirette mouthpiece

  • The ndd Spirette mouthpieces have been engineered to fit perfectly into ndd devices to guarantee reliable and high quality measurement results.
  • ndd Spirette mouthpieces prioritise hygiene and safe re-use of ndd devices by avoiding cross-contamination between patients.
  • The Spirette mouthpieces are single-use only and disposable.
Spirette mouthpiece


  • Swiss design by ndd engineers
  • Breathing tube for infection control
  • Ergonomic design for comfortable testing
  • Easy handling for technicians
  • No expiration date
  • No special storage condition

What’s in the box

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

Technical specifications


  • Spirette mouthpiece: Linear low density polyethylene (LLDPE)
  • 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 Spirette mouthpiece: 25 x 38 x 140 mm and 8 g (1 x 1.5 x 5.5 in and 0.3 oz)
  • Dispenser box: 23 x 19 x 19 cm (9 x 7.5 x 7.5 in)
  • Packaging box - 50 Spirette mouthpieces: 25 x 20 x 20 cm and 0.9 kg (10 x 8 x 8 in and 2 lb)
  • Packaging box - 200 Spirette mouthpieces: 25 x 39 x 39 cm and 2.3 kg (10 x 15 x 15 in and 5 lb)
  • Packaging box - 500 Spirette mouthpieces: 31 x 40 x 60 cm and 6.5 kg (12 x 16 x 24 in and 14.3 lb)

Downloads Spirette mouthpiece

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FAQs Spirette mouthpiece

The Spirette mouthpieces are single-use only and disposable.

To avoid cross contamination the Spirette mouthpiece is recommended to be used only once. Washing / disinfection of the Spirette mouthpiece might damage sensitive parts, which may compromise the test results and the safe avoidance of cross contamination.

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

To add a filter (2) to the EasyOne Pro, insert the (1) Spirette FA Pro/LAB into the EasyOne Pro handle. Then attach the filter to the Spirette FA Pro/LAB, 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].

The Spirette is a single-use item. By changing the Spirette between patients no contamination from exhaled breath or mucus can be transferred from one patient to the next – risk of cross-contamination is eliminated. Find scientific proof that EasyOne devices with Spirettes offer an absolutely hygienic and reliable solution here.


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