asma-1 Asthma Monitor

Ideal for monitoring PEF and FEV1 at home, work, in clinical trials, in primary or secondary care.

The Vitalograph asma-1™ is a lightweight home use electronic respiratory monitor that measures PEF and FEV1. It offers greater accuracy than mechanical peak flow meters and eliminates the need for paper record cards.

  • Measures FEV1 and PEF.
  • 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.
  • Suitable for use in clinic with Bacterial Viral Filters (BVF™).
  • Compliant with ATS/ERS 2019 and ISO 23747 / 26782 / 13485
  • Large, easy to read display.


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


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: 40000

Respiratory Monitor asma-1
Model 4000
Dimensions 109mm (length) x 63mm (width) x 42mm (height)
Flow Detection Principal Stator rotor
Accuracy Better than ± 3% (FEV1)
Back pressure Less than 0.15kPa/L/second @ 14L/s
Measurement Range FEV1: 0 – 9.99 L BTPS
Maximum test duration 6 seconds
Quality Check Slow start of test (Vext>5%) or a cough detected in the first second
Power Supply 3V (2 x 1.5V AAA batteries)
Expected Battery Life 3 months of use at 3 tests per day
Performance standards & guidelines: ATS/ERS 2019, ISO 23747:2015, ISO 26782:2009
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 0 200 200 600 0
Personal best
PDF Reports
Import Data to SpV


It is recommended to use a BVF if the asma-1 is intended for multi-subject 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 from exhaled particulate matter where this may be a concern.

The (!) appears after a blow if; Vext (extrapolated volume) is > 5% or 100mL of FEV6 or a cough is detected in the 1st second.

If a new BVF is used for every test subject and the device is stored in a clean, dust free environment, then the monitor should require only surface cleaning using a 70% isopropyl alcohol wipe. If you suspect that the device flow head has become contaminated, refer to the 4000 Series Cleaning Instructions.


No, but results can be entered manually.

To connect to a supported mobile App, you require the lung monitor BT Smart. If you want to learn more talk to us.

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