EasyOne® Air

Portable & PC spirometer

EasyOne® Air is a flexible, accurate and proven spirometry solution designed for healthcare providers large and small. Utilizing TrueFlow™ technology, this portable spirometer delivers reliable results without the need for calibration to ensure lifetime worry-free operation. Thanks to the vivid color touch screen, it is easy to navigate, view real-time results and enter data.

  • Flexible Use, Consistent Results
    EasyOne® Air can be used as a portable or as a PC spirometer. It delivers consistent results regardless of setting or environmental factors.
  • Calibration-free TrueFlow™ Technology
    Utilizing high-quality components and Swiss precision-engineering, TrueFlow™ delivers robust and reliable testing results without needing calibration.
  • Color Touch Screen
    View real-time graphs, quickly enter patient data and easily navigate with the high resolution color touch screen in the EasyOne® Air.
  • Bluetooth and EMR Connectivity

    Easily connect to PC for real-time patient incentives, data exchange and EMR connectivity.

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Why our customers love us


Ready to Take on Any Challenge

Regardless of location, environment or number of tests you will perform, EasyOne® Air will exceed your expectations.

  • Reliable design tried and tested at large screening events
  • Extremely robust TrueFlow™ measurement technology
  • Performs up to 100 complete tests with one battery charge
  • Proven completely calibration-free device

Choose Between Portable Mode and PC Mode

Use EasyOne® Air in portable mode, where the data is stored and the graph is displayed directly on the device, or use it in PC mode for more options.

  • Portable or PC mode
  • Stable Bluetooth connection
  • Real-time curve display
  • Real-time data transfer

Connectivity to Printers, PCs and EMR

Easily integrate EasyOne® Air into your existing clinical workflow. The device is equipped with Bluetooth and USB modules making connections to printers, a central database and EMR systems extremely easy and stable.

  • Directly connect printers via USB or print via EasyOne Connect
  • Synchronize data via USB or Bluetooth
  • Integrate into all major EMR/EHR systems via HL7, XML, GDT, or API
  • Reference projects to all major EMR systems available on request
EasyOne connect icon

TrueFlow™ - Trusted Ultrasound Technology

Stop worrying about calibration or accuracy of flow measurements. TrueFlow™ is the only ultrasound technology proven to be accurate for a lifetime for flow and volume measurements.

To review case studies and additional information about our proven technology, please click here.

Infection Control

Avoid cross-contamination and reduce cleaning to an absolute minimum with the single-patient-use flow tube.

  • All parts exposed to patient's breath are single use
  • Only simple surface cleaning needed
  • No contamination of sensor possible
  • No humidity can get into the device

Customized Reports

Customize reports and chose the parameters to be displayed.

  • Choose which graphs to be displayed
  • Color reports for better visibility
  • Arrange graphs and parameters through EasyOne Connect
  • Choose between Z-score, % predicted and LLN through EasyOne Connect

QC-Grading and Result Interpretation

Get automatic quality grading and interpretation based on NLHEP and ATS/ERS with the EasyOne® Air.

  • Quality grades based on NLHEP and ATS/ERS for all tests
  • ATS/ERS interpretation
  • GOLD/Hardie, NICE, JRS and NLHEP

Large Selection of Predicted Sets (%Pred, Z-score and LLN)

The first in line for newly published predicted values: EasyOne® devices are used in predicted studies worldwide (e.g. LUNOKID, ALAT).

  • %Pred, Z-score, LLN
  • GLI (Stanojevic 2009, Quanjer 2012)
  • NHANES III (North America)
  • PLATINO (South America)
  • ERS (Europe) and JRS, IP, Chhabra (Asia)

Please see our specification below for a complete list of the supported predicted values.

Cyber Security Protection for IT and Patient Information

Protect your patient information. EasyOne® Air is a modern system designed to fulfill your cyber security needs.

  • Encrypted database
  • User authentication with automatic log off
  • User permission levels
  • FDA Approval in 2017 with cyber security documentation

Worldwide Compliance with Standards

Stay compliant with ATS/ERS standards and specific country regulations.

  • Fully conformant to ATS/ERS and ISO standards
  • Worldwide approvals
  • CE Approval
  • FDA Approval

FAQs EasyOne® Air

You can find the product specification on the respective product pages. The specification contains a list of all supported normal values.

To get more detailed information about the supported parameters, age range, ethnicities and height range of each supported predicted set, please click here.

BTPS Correction is used to convert flow and volume measured at ambient conditions to the conditions within the lungs. Ambient conditions are called ATP (ambient temperature, pressure); the conditions within the lungs are called BTPS (body temperature, pressure, water vapor saturated).

Click here for more information.

All our products can be purchased through our authorized distribution partners. Please contact us to receive more information on finding your local dealer.

A compatible printer can be connected directly to the cradle provided with the device. Please consult our Printer Compatibility List including thermal printer options.

You can also use our free companion PC software, EasyOne Connect. The device is connected to the PC via the USB cradle provided. Data from the spirometer is synchronized with the PC database, allowing you to print to any printer connected to that PC or network. EasyOne Connect also allows you to view, trend and create PDF reports.

It is also possible to send pdf reports directly to a connected PC via file exchange.

The EasyOne Air uses the patented ndd Flow Tube, a single-patient-use mouthpiece which ensures that no contamination can reach the internal flow path of the device. This means that no cleaning is required between patients, and no calibration, ever. Simply toss the Flow Tube after each test session.

EasyOne Connect is the free companion PC software for the EasyOne Air. It can be downloaded directly from our web site. Here are a few of the features and benefits of using EasyOne Connect:

  • Long-term storage of test data
  • Ability to enter patient demographics from the PC
  • Connectivity with your EMR system
  • Ability to over-read and manipulate data on the PC
  • Export of data in many different formats, including the ability to create PDF reports
  • Bluetooth allows wireless viewing of real-time curves on PC display, or use of real-time animated/pediatric incentives
  • View and print trend graphs
  • Create custom test report templates

The on-board memory for the EasyOne Air spirometer can store approximately 10,000 tests. For long-term storage the data can be synchronized to the EasyOne Connect PC software database.

The EasyOne Air spirometer uses a rechargeable lithium-ion battery. An empty battery can be fully charged in about 5 hours. A fully-charged battery can support the performance of approximately 100 spirometry test sessions. While a new battery is likely to work for several years, ndd recommends that the battery be replaced every 1–2 years to ensure trouble-free performance.

All EasyOne products are designed to require no calibration and only minimal maintenance. We do not recommend a specific schedule for calibration checks. The device is designed to remain in calibration throughout its lifetime. A number of independent papers have been published that confirm this long-term stability.

However, within the industry, there are published standards where recommendations and requirements for calibration verification are set. For example, the ATS recommends daily calibration checks on all spirometry equipment, regardless of manufacturer. Further, all testing that falls under the requirements of NIOSH/OSHA and Social Security/Disability should be accompanied by a daily calibration check. For those wishing to perform calibration checks ndd offers a 3-Liter calibration syringe.

Yes, ndd’s products are all completely HL7 compatible through EasyOne Connect, the free companion PC software, enabling connectivity to virtually all EMRs. We would be happy to work with you to configure an interface for your particular EMR system. We are also constantly working to expand our library of dedicated integrations. For more information on connectivity with your particular EMR contact our Technical Support team.

Specifications EasyOne® Air

Quality, Medical Devices & Electrical
ISO 13485 , ISO 14971, IEC 62366 ,IEC 62304 , ISO 26782, ISO 23747 ,IEC 60601-1, IEC 60601-2, ISO 10993-1
510(k) clearance
Associations & Institutes
Available languages
English, French, German, Spanish
Printing options
Direct to printer or with EasyOne Connect software
Data management
EasyOne Connect
HL7, XML, GDT, with software
Data links
USB, Bluetooth
Test storage
Up to 10‘000 tests
Age range
Spirometry > 4 years
87 x 155 x 36 mm (H x W x D), 356 g 3.4 x 6.1 x 1.4‘‘ (H x W x D), 13 oz
Device classification
Type BF applied part
Operating conditions
Temp 0 - 40 °C/ 32 - 104 °FRel. Humidity 5 - 90% Athmosph. Pressure 700 - 1060 hPa
Power supply
5 VDC, Standby 0.3W
Rechargeable battery
Exchangeable, 3.6 VDC
BEV, EOTV, FEF10, FEF25, FEF 2575, FEF2575/FVC, FEF40, FEF50, FEF50/FVC, FEF60, FEF75, FEF80, FET, FET2575, FEV.25, FEV.5, FEV.5/FVC, FEV.75, FEV.75/FVC, FEV1, FEV1/FEV6, FEV1/FVC, FEV3, FEV3/FVC, FEV6, FVC, MEF20, MEF25, MEF40, MEF50, MEF60, MEF75, MEF90, MMEF, PEF, PEFT, t0
BEV, EOTV, FEF10, FEF25, FEF 2575, FEF2575/FVC, FEF40, FEF50, FEF50/FVC, FEF60, FEF75, FEF80, FET, FET2575, FEV.25, FEV.5, FEV.5/FVC, FEV.75, FEV.75/FVC, FEV1, FEV1/FEV6, FEV1/FIV1, FEV1/FVC, FEV3, FEV3/FVC, FEV6, FIF25, FIF50, FIF50/FEF50, FIF75, FIV.25, FIV.5, FIV1, FVC, MEF20, MEF25, MEF40, MEF50, MEF60, MEF75, MEF90, MIF25, IF50, MIF75, MMEF, PEF, PEFT, t0
ERV, IC, IRV, Rf, VC, VCex, VCin, VCmax, VT
MVV, MVV6, MVVtime, VT
Stanojevic 2009, Quanjer 2012
North America
NHANES III (Hankinson) 1999, Knudson 1983, Knudson 1976, Crapo 1981, Morris 1971 & 1976, Hsu 1979,Dockery (Harvard) 1993, Polgar 1971, Gutierrez (Canada) 2004, Eigen 2001
Latin America
Pereira 1992, Perreira 2006 & 2008, Pérez-Padilla (PLATINO) 2006, Pérez-Padilla (Mexico) 2001,Pérez-Padilla (Mexico, Pediatrics) 2003, Chile 2010, Chile (Pediatrics) 1997
ERS (ECCS, EGKS, Quanjer) 1993, Zapletal 1977, Zapletal 2003, Rosenthal 1993, Austria 1988, Austria 1994,Sapaldia (Switzerland) 1996, Roca (Spain, SEPAR) 1982, Garcia-Rio (SEPAR) 2013, Vilozni 2005, Falaschetti 2004,Klement (Russia) 1986
Europe Scandinavia
Hedenström 1985 & 1986, Gulsvik (Norway) 1985, Berglund Birath (Sweden) 1963, Langhammer (Norway) 2001, Finnish 1982 (1998), Nystad 2002
Hibbert 1989, Gore Crockett 1995
Chhabra (India) 2014, Dejsomritrutai (Thailand) 2000, Indonesia 1992, IP (China, HongKong) 2000 & 2006,JRS 2001 & 2014
Ethiopia 1985
Ultrasonic transit time
Flow Range
± 16 l/s
Flow Resolution
4 ml/s
Flow Accuracy (except PEF)
± 2% or 0.020 l/s
PEF Accuracy
± 5% or 0.200 l/s
MVV Accuracy
± 5% or 5 l/min
Volume Range
± 12 l
Volume Resolution
1 ml
Volume Accuracy
± 2% or 0.050 l
0.3 cm H20/l/s at 16 l/s
Part Numbers
EasyOne Air US Type A package
EasyOne Air EU Type C package
EasyOne Air UK Type G package
EasyOne Air AUS Type I package
EasyOne Air India Type M package
EasyOne Air Canada Type A package
Part Numbers
EasyOne Flow Tube, individually wrapped, box of 50 pcs
EasyOne Flow Tube, individually wrapped, box of 200 pcs
EasyOne Flow Tube, individually wrapped, box of 500 pcs
ndd Calibration syringe 3L with EasyOne Flow Tube Cal Check Adapter
EasyOne Flow Tube Adapter