Summary of SFM4300 – MASS FLOW METER FOR SENSITIVE GAS MIXTURE MEASUREMENT AT LOW FLOW RATES
The SFM4300 is a compact mass flow meter offering high precision for low flow rates, specifically designed for gas mixing in medical and industrial settings. Unlike its predecessor, it supports monitoring gas mixtures of air, O2, and N2O with excellent zero-point accuracy. Featuring an I²C interface and temperature compensation, it withstands pressures up to 6 bar and serves applications including anesthesia machines, fuel cells, and welding.
Parts used in the SFM4300 Project:
- SFM4300 Sensor Unit
- I²C Interface
- Downmount Mechanical Connection
- Legris Mechanical Connection
- O-rings
- Temperature Compensation Circuitry
The mass flow meter SFM4300 features improved sensitivity and precision, even for low flow rates.
The small, compact sensor is calibrated for air, O2 and N2O gases and – in contrast to its predecessor, the mass flow meter SFM4100 – it can also be used to monitor gas mixing. With a zero-point accuracy of 0.005 slm for a total range of up to 20 slm, the SFM4300 enables precise adjustment of the concentration in a wide selection of mixtures. The sensor unit has an I²C interface and produces a fully calibrated and temperature-compensated output signal. The mass flow sensor can be used for both medical and industrial gas mixing, fuel cells and for other OEM applications.
Features
- Compact
- High precision and sensitivity (esp. for low flow rates)
- Flow range: 0 to 20 slm
- Very pressure-resistant (up to 6 bar)
- Multigas option: O2, air, NO2 (other calibrations on request)
- Fully calibrated and temperature-compensated
- Digital I²C interface
- Mechanical connections: downmount, Legris, O-rings
Applications
- Medical gas mixing: anesthesia, vaporizers
- Industrial gas mixing: welding applications
- Fuel cells
- OEM applications
Flow Sensors for Gas Mixing in Respiratory Devices
In addition to inspiratory, expiratory and proximal flow measurement, Sensirion offers sensor solutions for gas mixing applications. These sensors are mainly used in anesthesia machines and are usually integrated into the overall machine. If we want to guarantee the patient’s safety while taking accurate, reproducible readings, we need the flow sensors in the machine to be stable and reliable – throughout the machine’s service life. Therefore, the Sensirion SFM4000 series is the ideal solution. It is is devided in two sensors: SFM4300 and SFM4200. The SFM4300 sensor can operate at pressures of up to 6 bar, store multiple gas calibrations and even perform self-testing while in use. Where safety and reliability are concerned, the SFM4300 is the preferred choice. The SFM4200 sensor is highly resistant to pressure, it guarantees reliable measurements at surges of up to 8 bar. Its signal processing time is 0.5 ms, making it incredibly fast and accurate. Customers also benefit from an expanded measurement range of up to 160 liters per Minute.
Read more: SFM4300 – MASS FLOW METER FOR SENSITIVE GAS MIXTURE MEASUREMENT AT LOW FLOW RATES
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What gases is the SFM4300 calibrated for?
The sensor is calibrated for air, O2, and N2O gases. -
Can the SFM4300 monitor gas mixing?
Yes, unlike its predecessor SFM4100, it can be used to monitor gas mixing. -
What is the maximum pressure resistance of the SFM4300?
The sensor is very pressure-resistant and can operate at pressures up to 6 bar. -
Does the SFM4300 offer temperature compensation?
Yes, the sensor produces a fully calibrated and temperature-compensated output signal. -
What type of digital interface does the SFM4300 use?
The sensor unit has a digital I²C interface. -
Are there specific mechanical connection options available?
Available mechanical connections include downmount, Legris, and O-rings. -
What are the primary applications for this mass flow meter?
It is used for medical gas mixing, industrial gas mixing, fuel cells, and OEM applications.
