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Cough Peak Flow Meter: Clinical Expiratory Pulmonary Diagnostic Equipment
Quick Answer: A cough peak flow meter measures peak expiratory flow during a voluntary cough in liters per minute. Silver Instruments does not sell this clinical pulmonary diagnostic device. For industrial gas flow meters used on medical gas lines, respiratory test benches, and hospital utility systems, send us your gas type, pressure in bar, temperature in °C, pipe size DN, and flow range.
What a Cough Peak Flow Meter Measures
A cough peak flow meter is a handheld device used in respiratory care and critical care units. It captures the highest flow rate a patient can generate during a cough. The display shows liters per minute. Clinicians use the value to assess cough strength, airway clearance ability, and risk of secretion retention. This clinical expiratory pulmonary diagnostic equipment is common in neuromuscular clinics, ICU weaning protocols, and pulmonary rehabilitation wards.
Typical measuring range for an adult unit is 60 to 900 L/min with a resolution of 10 L/min. Accuracy is often plus or minus 10 percent of reading or plus or minus 10 L/min, whichever is larger. Pediatric units may cover 30 to 300 L/min. In practice, many ICU teams record three attempts and use the best value.
Clinical Values and Common Reference Points
An adult with a cough peak flow above 360 L/min usually has enough cough strength to clear airway secretions. Values below 160 L/min often indicate weak cough and higher risk of secretion buildup. These numbers vary by center. A respiratory therapist in a Manila hospital told us they check cough peak flow before extubation. They also check it for patients with Guillain Barre syndrome. This is the kind of field detail that matters more than a catalog number.
Why Silver Instruments Does Not Supply Cough Peak Flow Meters
Silver Instruments focuses on industrial flow measurement and process instrumentation. A clinical cough peak flow meter requires medical device certification such as ISO 13485, FDA 510k where applicable, and clinical performance validation. Industrial flow meters follow different standards such as ATEX, SIL, NIST traceable calibration, and process piping codes. We keep these product lines separate. Most engineers skip this part, but regulatory mismatch is a real problem. If you need a handheld clinical device, contact a medical device distributor.
Where Silver Instruments Fits in Medical Gas and Respiratory Test Systems
We do supply flow meters used in hospital utility rooms, medical air plants, oxygen manifolds, and respiratory device test benches. Here is the thing: a cough peak flow meter is a clinical diagnostic tool. An industrial flow meter on a medical air line is a process monitoring device. They are not interchangeable, but they can be used in the same facility.
For compressed air flow in a hospital medical gas pipeline at 7 bar and 20 to 30 °C, a thermal mass flow meter with DN15 or DN25 connection works well. It provides direct mass flow reading, 4-20 mA HART output, and a local totalizer. We have supplied this configuration to a medical air plant in Saudi Arabia. The customer needed to track total air consumption per shift and se
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For oxygen flow measurement on a ventilator test bench, a Coriolis mass flow meter with DN4 or DN6 connection measures mass flow directly. Accuracy can reach 0.1 percent of reading. This is useful when the test bench must log oxygen consumption in kg/h or standard liters per minute. A biomedical engineering service company in Vietnam asked us for a small Coriolis meter for oxygen flow at 0 to 5 kg/h. We recommended a DN4 Coriolis meter with 4-20 mA HART and local display. They installed it downstream of a pressure regulator and upstream of a needle valve.
For cooling water circuits in medical air compressors or vacuum pumps, an electromagnetic flow meter with PTFE liner and stainless steel electrodes is a common choice. DN25 to DN50 covers most small hospital utility systems. Output can be pulse, 4-20 mA, or RS485 Modbus.
Recommended Measurement Points and Parameters
When you measure gas flow on a respiratory test bench, choose the meter based on gas type, flow range, pressure, temperature, and pipe size. For dry compressed air at 2 to 6 bar, 20 to 40 °C, DN15 pipe, and 0 to 200 L/min, use a thermal mass flow meter with 4-20 mA HART. For oxygen at 1 to 4 bar, 15 to 30 °C, DN6 pipe, and 0 to 10 kg/h, use a Coriolis mass flow meter. For cooling water at 2 to 5 bar, 10 to 35 °C, DN40 pipe, and 0 to 30 m3/h, use an electromagnetic flow meter. These are real sizing examples, not generic suggestions.
Installation matters. Put the flow meter downstream of a pressure regulator and a filter. Avoid elbows and valves close to the inlet. Allow enough straight pipe length, usually 10 times the pipe diameter upstream and 5 times downstream. If the gas is humid or contains oil mist from a compressor, tell us before quoting. That changes the sensor material and calibration approach.
FAQ
Does Silver Instruments sell cough peak flow meters?
No. We do not supply handheld clinical expiratory pulmonary diagnostic equipment. We supply industrial flow meters for process and utility applications.
What flow meter can I use on a ventilator or oxygen test bench?
For gas mass flow measurement, select a thermal mass flow meter or a Coriolis mass flow meter depending on accuracy, pressure, and flow range. Send us the gas type and flow range, and we will recommend a model.
What is the normal cough peak flow for an adult?
Many clinical references use 360 L/min or higher as normal. Values below 160 L/min are often considered weak. Use hospital specific protocols for diagnosis.
Can Silver Instruments calibrate a flow meter for oxygen or medical air?
Yes, we can arrange NIST traceable calibration for industrial gas and liquid flow meters. Tell us the gas type, pressure, temperature, and accuracy target.
What details do you need for a quote?
Send gas type, pressure in bar, temperature in °C, pipe size DN, minimum and maximum flow rate, output signal, and power supply. Our engineers will reply with a model and price.
Contact Silver Instruments for industrial flow meter selection. Tel: +86-25-68650347. WhatsApp: +86-25-52155837. WeChat: +86 15365082610. Website: https://flow-meter.com.au
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