Home / Products / asma-1 USB Asthma Monitor

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


Vitalograph provides free certified training for all of its respiratory diagnostic solutions. Register here.

Click here for reimbursement codes for Vitalograph Devices in the USA.

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
Dimensions109mm (length) x 63mm (width) x 42mm (height)
Flow Detection PrincipalStator rotor
Back pressureLess than 0.15kPa/L/second @ 14L/s
Measurement RangePEF: 25 – 840 L/min BTPS FEV1: 0 – 9.99 L BTPS
Maximum Test Duration1 second
Quality CheckTime to Peak Flow >120ms or a cough detected in the first second
Power Supply2 x 1.5V AAA batteries
Battery Life3 months of use, 3 tests per day
Performance standards:ATS/ERS 2019 Technical Standards, ISO 23747:2015, ISO 26782:2009
QA/GMP standardsEN ISO 13485, FDA 21 CFR 820, MDSAP.
PC RequirementsWindows® 7, Windows® 8 or Windows® 10
Auto Power Down Time2 minutes

Product Specification

 asma-1asma-1 Childasma-1 USB/BTCOPD-6COPD-6 USB/BTlung monitorlung monitor USB/BTlung monitor BT Smartlung age
FEV1 Ratio
Lung Age
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.

Talk to Us

For information on any of our products, click the inquiry button, enter your query and we will get back to you.

Talk to Us

For information on any of our products, click the inquiry button, enter your query and we will get back to you.

Get A Quote