Vitalograph Asma-1 Electronic Asthma Monitor

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


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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


  • Measures FEV1 and peak flow;
  • Simple to use;
  • Large, easy to read display;
  • No need for record cards;
  • Quality of blow indicator;
  • Suitable for multi-subject use with standard size SafeTway mouthpieces;
  • Uses long life AAA batteries;


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.

No, but results can be entered manually.To connect to a supported mobile App, you require the lung monitor BT Smart.

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

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Vitalograph Asma-1 Electronic Asthma Monitor
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