Description
Features
- Fast update time with excellent accuracy
- Integrated thermal sensor chip with a high-performance 24-bit AD acquisition CMOS microprocessor
- Standard I2C interface for convenient communication with the device
- Ability to measure several gases such as air, oxygen, and other non-aggressive gases
- Special design of sensor channel resulting in a low-pressure drop
- Fully calibrated and temperature compensated out of the box
- The gas flow through the sensor can be bidirectional
- Very suitable for medical applications
Description
The AFM3000-200 mass airflow sensor is designed specifically for ventilator applications. It measures the flow rate of air, oxygen, and other non-aggressive gases with excellent accuracy. A special design of the mass flow sensor channel results in a very low-pressure drop through the flow body of the sensor making it extremely suitable for very demanding applications, such as medical ventilation and respiratory applications.
This mass flow sensor combines a thermal sensor chip and a high-performance integrated 24-bit AD acquisition CMOS microprocessor. The flow rate of the gas is measured by a thermal sensor element which assures very fast signal processing time and bidirectional measurement with best-in-class accuracy.
The AFM3000 operates from a 5 Volts power supply and features a digital I2C interface. The measurement results are internally linearized, and temperature compensated.
How does it work?
Inside the package, this has a thermal sensor and a heating source. When gas starts flowing through the heating source, the flowing gas molecule transport the heat away, resulting in a change in temperature difference between the thermal sensor and the heating source. This is then interpreted into a value and sent through the serial I2C communication interface to calculate the flow.
Tip
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Specifications
| Measurement Range | -200～+200SLM |
|---|---|
| Accuracy | ±1.5%(typical) |
| Repeatability | ±0.5%(typical) |
| Test gases | air, N2, O2, non – corrosive gases |
| Operating Temperature | 0～+50°C |
| Supply Voltage | 5VDC |
Applications
- Medical ventilators
- Automatic Control
- Burner control
- Fuel cell control
- Environmental monitoring
- Laboratory Instruments
Pin Definition
| Pin | Condition | Type | Description |
|---|---|---|---|
| 1 | VDD | +5V | Power Supply Pin |
| 2 | SDA | IN/OUT | I2C Digital Communication Data Pin |
| 3 | GND | / | Ground |
| 4 | SCL | IN | I2C Digital Communication Clock Pin |
Dimensions
Parts List
1 x Mass Air Flow Sensor – AFM3000-200
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