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Asthma Peak Flow Meter Chart for Adults: Demographic Expected Target Value Guide
Quick Answer: A peak flow meter for asthma measures how fast an adult can exhale air after a full breath. Expected target values depend on age, sex, height, and lung condition. Silver Automation Instruments does not sell medical peak flow meters. We supply industrial flow meters for process air, gas, water, and liquid lines.
What the Adult Chart Shows
Most medical charts show expected peak expiratory flow in liters per minute. The value is often shortened to PEF. A healthy adult can usually produce a PEF between 400 and 700 liters per minute. The exact number depends on physical size and age. Taller adults tend to have higher values. Men often have higher values than women of the same age and height.
Demographic Factors That Change Expected Values
Age matters. A man at 30 years old with a height of 175 cm may expect a PEF around 600 liters per minute. A man at 60 years old with the same height may expect a value closer to 500 liters per minute. Height matters more than age in many cases. A shorter adult with a height of 150 cm may expect a PEF near 350 liters per minute.
Sex is another factor. Women with a height of 160 cm often see expected values around 450 liters per minute. Men with a height of 170 cm often see values around 550 liters per minute. These are population averages. Individual variation is normal.
Typical Adult Target Value Ranges
Many asthma plans use a three zone system. A green zone is 80 to 100 percent of a personal best value. A yellow zone is 50 to 80 percent. A red zone is below 50 percent. The personal best value is the highest PEF a patient records when symptoms are under control. Population charts are a starting point. A doctor sets the target for each patient.
How to Read a Peak Flow Meter Chart
The chart usually has columns for age, height, and sex. You find the row that matches the person. The number in that row is the expected PEF. Most devices show liters per minute on a scale. The patient blows into the device three times. The highest of the three readings is the one to record. Most engineers skip this part because it sounds simple. The repeat testing is what makes the number useful.
Where Industrial Flow Measurement Differs
Silver Automation Instruments works with industrial flow meters. A medical peak flow meter is not the same as an industrial gas flow me
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Industrial Flow Meter Selection Details
When you contact Silver Automation Instruments, include your process data. Send your pressure in bar, temperature in °C, pipe size in DN, and flow range. This helps our engineers recommend the right meter. For example, a seawater desalination plant in Vietnam may need an electromagnetic flow meter for raw water at DN150 and 4 bar. A paint manufacturer in Southeast Asia may need a Coriolis mass flow meter for solvents at 20 kg/h and 2 cP viscosity. We have seen these cases on customer sites many times.
Contact Silver Automation Instruments
For industrial flow meter quotes, contact Silver Automation Instruments. Tel: +86-25-68650347. WhatsApp: +86-25-52155837. WeChat: +86 15365082610. The team can review your operating conditions and suggest a meter for gas, liquid, or steam.
FAQ
What is a normal peak flow value for a healthy adult?
A normal adult PEF is often between 400 and 700 liters per minute. The value depends on age, sex, and height. Taller adults and men often have higher values.
How do age, height, and sex change the expected peak flow value?
Height has a large effect. Age reduces the expected value slowly after middle age. Sex also changes the value because men tend to have larger airways.
Can I use a medical peak flow meter for industrial gas flow measurement?
No. A medical peak flow meter is not built for pipe pressure, temperature, or continuous use. Industrial gas flow meters have calibration for process conditions and output signals like 4-20 mA HART.
Does Silver Automation Instruments sell asthma peak flow meters?
No. Silver Automation Instruments is an industrial flow meter manufacturer. We do not supply medical devices or asthma peak flow meters.
What information should I send for an industrial gas flow meter quote?
Send your pressure in bar, temperature in °C, pipe size in DN, flow range, and gas type. Also include your signal requirement such as 4-20 mA HART or Modbus.