AirLife Peak Flow Meter Chart: Expected Expiratory Targets by Demographic

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AirLife Peak Flow Meter Chart: Expected Expiratory Targets by Demographic

Quick Answer: The AirLife Peak Flow Meter Chart: Expected Expiratory Targets by Demographic gives predicted expiratory flow values by age, sex, and height. Adult men often fall between 500 and 700 litres per minute. Adult women often fall between 400 and 550 litres per minute. These values help clinics compare patient readings against a demographic baseline before purchase or replacement.

What the AirLife Peak Flow Meter Chart Actually Lists

The chart lists predicted peak expiratory flow values in litres per minute. It sorts those values by three variables. Age is the first variable. Height is the second variable. Sex is the third variable. A male patient aged 35 years and 175 cm will not share the same expected PEF as a female patient aged 65 years and 158 cm. This is why demographic reference tables exist in respiratory clinics and hospital wards.

The chart range usually starts near 70 L/min for shorter children and extends past 800 L/min for tall younger adult males. In practice, most spot checks in outpatient clinics sit between 300 and 650 L/min. The single reading is not the only number that matters. The distance from the expected demographic target matters just as much.

Expected Values by Age and Sex

Adult males from 20 to 40 years old often show predicted values from 550 to 700 L/min depending on height. Adult females in that same age band often show predicted values from 400 to 550 L/min. These are not pass or fail limits. They are reference points for asthma action plans and routine respiratory screening.

Children step down sharply on the chart. A child at 110 cm may have an expected PEF near 150 to 180 L/min. A child at 130 cm may move to 220 to 270 L/min. For older adults, values decline with age. A male at 70 years old may have an expected PEF near 450 L/min. A female at that same age may sit near 320 L/min. These numbers shift by population and chart version, so print the correct AirLife chart before clinical use.

Clinic Use and Procurement Checks

Clinics usually keep the chart near the pulmonary function test station. A nurse or technician records patient age, height, and sex first. The patient then performs three forceful exhalations into the AirLife peak flow meter. The best of the three readings is compared with the chart value. If the reading is below 80 percent of the predicted value, the clinic may repeat the test or refer the patient for further review.

Hospital procurement teams should ask for the printed chart and the current digital version. A hospital group in Jakarta once compared two charts that differed by 30 L/min for the same height and age band. The team had to check which chart matched the national respiratory guideline before ordering 50 units. A community clinic in Manila replaced 40 peak flow meters after finding its printed chart was older than the national asthma protocol.

AirLife Peak Flow and Industrial Flow Meters Are Not the Same

This is a different category from the industrial flow meters that Silver Automation Instruments supplies. A medical peak flow meter measures exhaled air speed in litres per minute. An industrial electromagnetic flow meter measures conductive liquid flow in cubic metres per hour or litres per hour. Both need calibratio

We have seen this on customer sites many times. Engineers in Vietnam, Nigeria, and Saudi Arabia ask for a clear reference table before they accept any flow meter. The same habit applies in medical procurement. A clear chart prevents disputes during supply tenders and local audits.

For industrial water lines from DN15 to DN300, Silver Instruments often recommends an electromagnetic flow meter with PTFE liner, 316L electrodes, and 4-20 mA HART output. For diesel and oil, an oval gear flow meter is a common choice. For mass flow, a Coriolis meter handles density and flow in one device. AirLife devices fall under clinical validation and licensed medical distribution, which is a separate supply channel.

Specifications to Verify Before Purchase

Expected PEF values are usually stated in litres per minute. The useful range for most adult charts is 100 to 850 L/min. Pediatric charts may start at 60 L/min and go up to 450 L/min. Users should check the chart version because some versions are based on European populations, while others use North American or Southeast Asian reference data.

Peak flow meters used with these charts often have a mechanical scale with a 10 L/min marking. Some digital units offer a 1 L/min display. The tolerance in a mechanical unit may be plus or minus 10 percent or 10 L/min. A low reading after three attempts may indicate poor technique rather than a real drop in lung function. Most engineers skip this part, but repeatability matters more than a single high value.

FAQ

Question one: What does the AirLife peak flow meter chart predict?
It predicts the expected peak expiratory flow for a person based on age, height, and sex. The value is a reference point, not a strict pass or fail limit.

Question two: How often should the chart be updated?
Clinics should replace printed charts when the manufacturer revises the reference data. Most printed versions last two to four years if kept away from direct sunlight and humidity.

Question three: Can the AirLife chart be used for children?
Yes. Pediatric charts use smaller height bands and lower PEF values. A child at 120 cm may have a predicted value near 200 L/min, depending on the chart version.

Question four: What is a normal adult PEF value?
A common adult male value is 550 to 700 L/min. A common adult female value is 400 to 550 L/min. Age and height move these numbers up or down by 50 to 100 L/min.

Question five: Does Silver Instruments supply AirLife peak flow meters?
No. Silver Automation Instruments supplies industrial flow meters such as electromagnetic, Coriolis, and oval gear models for oil and gas, water and wastewater, chemical, food and beverage, and marine sectors. For AirLife peak flow meters, contact a licensed medical device distributor.

Contact Silver Instruments for industrial flow meter selection in Southeast Asia, Oceania, Latin America, Africa, and the Middle East. Tel: +86-135-1213-1526. Whatsapp: 86-135-12131526. WeChat: +86 13512131526. Send us your fluid type, pressure in bar, temperature in degrees Celsius, pipe size in DN, and flow range.

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