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Clement Clarke Peak Flow Meter: Mechanical Expiratory Testing Device Sizing
Quick Answer: The Clement Clarke peak flow meter is a mechanical expiratory testing device that measures peak expiratory flow in liters per minute. Choose the Standard Range model for most adults and the Low Range model for children or patients with severe airway obstruction. Send your patient age range, expected peak flow and required quantity to Silver Instruments for a quotation.
Most engineers and clinical staff skip the sizing step. They assume one peak flow meter fits all users. In practice that causes off scale readings or poor repeatability. We have seen this in clinics across Southeast Asia and the Middle East. Here is the thing: a mechanical expiratory testing device is simple but the range must fit the user.
Why Sizing Matters for a Mechanical Expiratory Testing Device
Peak flow meters record the fastest air speed during a forced expiration. The reading is shown in liters per minute. If the range is too high a child or a severe asthma patient may not move the indicator far enough to record a useful value. If the range is too low an adult with strong lung function may push the indicator past the scale.
Clement Clarke Mini Wright peak flow meters use a mechanical piston and a linear scale. No batteries are required. The standard model covers 60 to 800 liters per minute. The low range model covers 30 to 400 liters per minute. That difference matters more than most buyers think.
Standard Range vs Low Range
For most adults and adolescents above 12 years the Clement Clarke Mini Wright Standard Range is the default choice. It works well in occupational health checks for oil and gas workers, chemical plant operators and marine crews. A typical healthy adult male can produce a peak flow between 500 and 700 liters per minute. A healthy adult female often falls between 400 and 600 liters per minute. Those values sit inside the standard scale.
For children aged 6 to 12 years or for adults with severe asthma or COPD the Low Range model is the better choice. A child with mild asthma may produce 150 to 300 liters per minute. A patient with severe obstruction may not exceed 250 liters per minute. A standard range meter is not sensitive enough in that zone.
Key Specifications to Check
Confirm the scale range first. Confirm the scale type second. Clement Clarke supplies both EU scale and predictive scale versions in some markets. For most clinical protocols the EU scale is required. The mechanical housing is made of lightweight plastic with a stainless steel indicator. The mouthpiece is removable for cleaning and can be replaced
Repeatability is normally within plus or minus 10 liters per minute or plus or minus 5 percent of the reading. That is enough for asthma monitoring. For occupational spirometry screening a more advanced spirometer may be needed. Do not confuse a peak flow meter with a full spirometer. They answer different questions.
Where These Devices Are Used
We supply clinics, hospitals and occupational health providers in Southeast Asia, the Middle East, Latin America and Africa. A customer in Vietnam ordered 40 low range units for a pediatric asthma program last year. A marine services company in Oman keeps standard range units on board for crew fitness checks. A paint manufacturer in Malaysia uses them in annual medical surveillance. These are not rare use cases.
Mechanical peak flow meters remain popular because they are portable and do not need charging. In remote sites in West Africa or offshore platforms a simple device that works without a battery is often the only practical option.
How to Order from Silver Instruments
Send us three data points: patient age range, expected peak flow in liters per minute and the number of units you need. We will confirm the correct model, unit price and delivery time. We can also supply replacement mouthpieces and hard storage cases.
Contact Silver Automation Instruments at Tel: +86-25-68650347, WhatsApp: +86-25-52155837 or WeChat: +86 15365082610. Our team handles both industrial flow meters and respiratory testing device sourcing for export markets.
FAQ: Five Sizing Questions
What is the normal peak flow for an adult?
Most healthy adults range from 400 to 700 liters per minute. The standard range Clement Clarke meter covers 60 to 800 liters per minute and fits this population.
Which model is best for children?
Use the Low Range model for children under 12 years. It reads from 30 to 400 liters per minute and improves accuracy at low flow rates.
Can one device be used for multiple patients?
Yes. Use a new or disinfected mouthpiece for each patient. The main body can be wiped down according to the local infection control protocol.
Does the Clement Clarke peak flow meter require batteries?
No. It is fully mechanical. That makes it suitable for remote clinics and offshore sites where power or replacement batteries are limited.
What information do you need for a quote?
Send patient age range, expected peak flow values and quantity. We reply with model recommendation, unit price and shipping time from our export team.