Understanding Peak Flow Meters for Asthma Management

A peak flow meter is a simple device used to measure how well your lungs are working. It is a valuable tool for people with asthma, as it can help monitor their lung function and track changes in their condition. By regularly using a peak flow meter, individuals can better manage their asthma and take appropriate action when necessary.

Model pH/ORP-8500A pH/ORP Online Meter
Range pH:0.00~14.00 ; ORP:(-1999~+1999)mV; Temp.:(0.0~100.0)\u00b0C (Temp.Compensation: NTC10K)
Resolution pH:0.01 ; ORP: 1mV; Temp.:0.1\u00b0C
Accuracy pH:+/-0.1 ; ORP: +/-5mV(electronic unit); Temp.: +/-0.5\u00b0C
Temp. compensation NTC10K Temperature compensation
Medium Temp. (0~80)\u00b0C
Analog output Double channels isolated; transportable(4~20)mA, instruments/ transmitter mode
Control Output Triple channels semiconductor photoelectric switch, load current: AC/DC 30V, 50mA(max)
Communication port RS485,Modbus RTU protocol
Working Environment Temp.(0~80)\u2103; relative humidity <95%RH (non-condensing)
Storage Environment Temp.(-20~60)\u2103;Relative Humidity \u226485%RH (none condensation)
Power Supply DC 24V
Power consumption <3W
Protection level IP65 (with back cover)
Dimension 96mmx96mmx94mm(HxWxD)
Hole Size 91mmx91mm(HxW)

Peak flow meters measure the maximum speed at which you can blow air out of your lungs. This measurement is known as your peak expiratory flow rate (PEFR). By monitoring your PEFR regularly, you can identify patterns and trends in your lung function, which can help you and your healthcare provider make informed decisions about your asthma treatment.

Using a peak flow meter is simple and quick. To measure your peak flow, take a deep breath and then blow as hard and fast as you can into the mouthpiece of the device. The meter will then display a number that corresponds to your PEFR. It is important to record this number in a peak flow diary or asthma action plan, along with the date and time of the measurement.

Peak flow meters are available in different shapes and sizes, but they all work in a similar way. Some peak flow meters have a scale that is color-coded to help you interpret your results. Green indicates good lung function, yellow signals caution, and red indicates a medical emergency. It is important to familiarize yourself with the color-coding system of your peak flow meter to understand your results accurately.

Regularly measuring your peak flow can help you identify triggers that worsen your asthma symptoms. By tracking your PEFR before and after exposure to potential triggers, such as allergens or pollutants, you can determine which factors affect your lung function. This information can help you avoid triggers and better manage your asthma symptoms.

In addition to monitoring your lung function, peak flow meters can also help you assess the effectiveness of your asthma medications. By measuring your PEFR before and after taking your prescribed medications, you can determine how well your treatment is working. If your peak flow readings improve after using your medication, it is a sign that your treatment plan is effective. However, if your readings do not improve or worsen, you may need to adjust your medication or seek medical advice.


Peak flow meters are an essential tool for people with asthma, as they provide valuable information about lung function and asthma control. By regularly measuring your peak flow, you can track changes in your condition, identify triggers, and assess the effectiveness of your treatment. If you have asthma, talk to your healthcare provider about using a peak flow meter as part of your asthma management plan. By incorporating this simple device into your routine, you can take control of your asthma and improve your quality of life.