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0.3 L/Min Flow Meter for Medical Ventilation Monitoring
Quick Answer: Silver Instruments supplies thermal mass flow meters for medical ventilation monitoring that measure flows as low as 0.05 L/min and handle a typical range around 0.3 L/min. These meters respond in under 30 ms and output 4-20 mA or RS485 signals, which makes them suitable for breathing circuit testing and anesthesia equipment calibration. Send us your pressure, gas type, and connection size for a specific model recommendation.
Why 0.3 L/min Flow Measurement Is Critical
Medical ventilators, CPAP machines, and anesthesia workstations require accurate control of fresh gas flows down to 0.3 L/min. In neonatal ventilation, even a 0.1 L/min error can cause discomfort or hypoxemia. Most industrial turbine or differential pressure meters lose accuracy below 1 L/min. Here is the thing: thermal mass flow technology can measure tiny flows with high repeatability. It is why many biomedical engineers turn to Silver Instruments for low flow gas meters.
Introducing the Silver Instruments MFS-01 Thermal Mass Flow Meter
The MFS-01 is a compact inline thermal mass flow meter built for micro gas flow measurement. It covers a calibrated range from 0.05 L/min to 0.5 L/min, centering on the 0.3 L/min point common in ventilation test benches. The sensor uses a constant-temperature anemometer principle with a PT100 platinum thin-film element. Accuracy is plus minus 1.0 percent of reading or plus minus 0.01 L/min, whichever is greater. Response time is less than 30 ms. That means the meter can catch breath-by-breath variation in real time.
Process connection is a 3 mm or 1/8 inch compression tube fitting. Wetted materials are stainless steel 316L and PPS, so the meter handles clean medical gases without contamination. Output options include 4-20 mA, RS485 Modbus RTU, and programmable pulse. You can integrate it into a PLC or the embedded controller of a ventilator. Power supply is 24 VDC. Pressure drop at 0.5 L/min is below 0.5 mbar, so it does not load the breathing circuit.
Practical Applications in Medical Gas Testing
We have seen this flow meter used in three main scenarios. First, performance verification of flow control loops in ventilators. A biomedical equipment contractor in Chile placed ten MFS-01 units on a multi-channel rig to simultaneously validate neonatal, pediatric, and adult ventilator paths. Second, gas blending calibration for N2O and oxygen mixers. Because the MFS-01 has a fast response, it tracks the blending ratio changes and h
What to Specify for a 0.3 L/min Medical Ventilation Flow Meter
To quote accurately, we need your gas composition, maximum pressure, operating temperature, connection size, and output preference. Most medical applications use air or oxygen at near-atmospheric pressure and temperature between 15 degree C and 35 degree C. The MFS-01 works with air, oxygen, heliox, and nitrous oxide. For custom gas mixtures, we can adjust the calibration curve in our lab. A typical order includes a 4-20 mA output with a 2 m shield cable. If you need a higher IP rating or special cleaning for oxygen service, please mention it early.
Send us your pressure (bar), temperature (degree C), pipe size (DN, or tube OD), and flow range. You will receive a data sheet and a landed cost quote for your country.
FAQ on 0.3 L/min Medical Ventilation Flow Meters
What is the smallest flow the MFS-01 can measure reliably? The MFS-01 measures down to 0.05 L/min with specified accuracy. Below that, repeatability is still good but uncertainty increases. We often set a minimum cut-off for alarms at 0.05 L/min in the control system.
Can this flow meter handle pure oxygen safely? Yes. We offer oxygen-cleaned versions that follow ASTM G93 practices. Wetted parts are compatible with oxygen, and we use no hydrocarbon-based lubricants. State oxygen service in your inquiry for a proper cleaning certificate.
Do you provide calibration traceable to national standards? Each MFS-01 ships with a 6-point calibration certificate traceable to a primary piston flow standard. We can provide ILAC/MRA traceability upon request.
Is the output linearized for different gases? The factory calibration is for air. If you run the meter with oxygen or N2O, we build a multi-gas conversion curve into the microcomputer. You select the gas via a command over RS485, or we pre-configure it for a fixed gas.
What is the typical lead time for a sample unit? From our facility in China, we ship sample units within 5 working days. Express delivery takes 3 to 5 days to most destinations in Southeast Asia, the Middle East, and Oceania.
For a prompt quotation on a 0.3 L/min flow meter for medical ventilation monitoring, tell us your gas type, pressure, and connection details. We will reply with a complete offer within one business day.