asma-1 USB Asthma Monitor

Handheld device with USB connectivity and Vitalograph Reports Software


The Vitalograph asma-1™ is a user friendly electronic respiratory monitor that measures PEF and FEV1 and links easily to other devices by USB for reporting. Ideal for monitoring PEF and FEV1 at home, work, in clinical trials, in primary or secondary care.

It offers greater accuracy than mechanical peak flow meters and eliminates the need for paper record cards. 

Vitalograph Reports Software is included and allows you to product PDF reports.

One of our 4000 Series of respiratory monitors and screeners, the asma-1 comes with:

  • Pouch
  • Instructions for use
  • 2 x AAA Batteries
  • Plastic mouthpiece for single patient use
  • Vitalograph Reports Software


Get certified device training via our online training resource SpiroTutor™ by Vitalograph® which is available 24/7. We provide one FREE enrollment with the registration of your monitor.  A training certificate is issued upon completion.


Product Code: 40400_TH


  • Measures FEV1 and PEF.
  • Displays % of personal best FEV1.
  • Electronic record – no need for record cards.
  • Set unique ‘personal best’ zones for test subjects.
  • Automatically stores best values in a test session.
  • Quality of blow indicator.
  • 600 test memory.
  • Large, easy to read display.
  • Suitable for use in clinic with Bacterial Viral Filters (BVF™).


asma-1 USB reports include:

  • Information presented in tables and graphs.
  • Customizable report headers.
  • Ability to add comments to the report.
  • Subject ID and name fields.
  • Age, height, gender, and weight fields optional.
Respiratory Monitor asma-1 USB
Model 4000
Dimensions 109mm (length) x 63mm (width) x 42mm (height)
Flow Detection Principal Stator rotor
Back pressure Less than 0.15kPa/L/second @ 14L/s
Measurement Range PEF: 25 – 840 L/min BTPS FEV1: 0 – 9.99 L BTPS
Maximum Test Duration 1 second
Quality Check Time to Peak Flow >120ms or a cough detected in the first second
Power Supply 2 x 1.5V AAA batteries
Battery Life 3 months of use, 3 tests per day
Performance standards: ATS/ERS 2019, ISO 23747:2015, ISO 26782:2009
QA/GMP standards EN ISO 13485, FDA 21 CFR 820, MDSAP.
Communications USB2.0/3.0
PC Requirements Windows® 7, Windows® 8 or Windows® 10
Auto Power Down Time 2 minutes

Product Specification

  asma-1 asma-1 Child asma-1 USB/BT COPD-6 COPD-6 USB/BT lung monitor lung monitor USB/BT lung monitor BT Smart lung age
FEV1 Ratio
Lung Age
Memory 600 600 600 0 0 200 200 200 0
Personal best
PDF Reports
Import Data to SpV


A BVF is recommended to use if the asma-1 USB is intended for in clinic use. The plastic mouthpiece supplied with the device can be used where the device is intended for single-subject use. For subject groups with excessive sputum production, a BVF can be used to protect the device flowhead from exhaled particulate matter where this may be a concern.

(!) appears after a blow if a cough is detected in the 1st second.

If a new BVF is used for every test and the asma-1 USB is stored in a clean, dust free environment, then the device should require only surface cleaning using a 70% isopropyl alcohol wipe. Full instructions are available at 4000 Series Cleaning Instructions.

The asma-1 USB connects to PC using the USB cable supplied.

To connect to a supported mobile App, you require the lung monitor BT Smart. For more details talk to us.

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