Thermal gas flow meter Aosong AFM0711H00 with MEMS chip providing precise and stable mass flow data
Product Overview
The AFM07 series is a high-performance, stable, and reliable gas mass flow meter based on thermal measurement principles and utilizing 's proprietary MEMS mass flow chip. It accurately measures mass flow by detecting resistance changes, offering advantages such as precise measurement, stability, resistance to extreme temperatures, good linearity, fast response times, high integration, and cost-effectiveness. The device features an integrated LCD screen for displaying instantaneous and cumulative flow, with a screen that can rotate 90 for optimal viewing angles. Its compact size and clear digital display make it suitable for various gas flow measurement scenarios. Each unit undergoes rigorous factory calibration, providing direct and accurate flow data to reduce user costs and development complexity. The AFM07 series is designed for dry, clean, non-corrosive gases like air, nitrogen, argon, carbon dioxide, and oxygen (excluding flammable or explosive gases), finding wide application in research institutions, fire safety, environmental monitoring, tobacco, smart agriculture, food, and pharmaceutical industries.
Product Attributes
- Brand: (AOSONG)
- Model Series: AFM07
- Measurement Principle: Thermal measurement, MEMS mass flow chip
- Housing Material: PBT
- Air Duct Material: PBT
- Display: LCD Screen
- Communication Protocol: Modbus RTU
- Output Types: RS485, 2x NPN open collector (high/low limit alarm), 1~5V linear voltage
- Power Supply: 9~24V DC
- Lead Wire: PHB2.0 buckle double-row terminal wire (2*4), 30cm length, UL2464 material
- Connector Type: PHB-2*4AW
Technical Specifications
| Parameter | Description | AFM0710 | AFM0725 | AFM0750 | AFM0711 |
|---|---|---|---|---|---|
| Range | 0~10L/min | 0~25L/min | 0~50L/min | 0~100L/min | |
| Accuracy | 3%F.S. | ||||
| Repeatability | 1%F.S. | ||||
| Response Time | 50ms | ||||
| Max Working Pressure | 0.8MPa | ||||
| Standard Calibration Gas | Air (25, 1 atm) | ||||
| Working Temperature | -10~+60 | ||||
| Power Consumption | Typical | 0.85W | |||
| Product Weight | 56g | ||||
| Dimensions (mm) | (Refer to Figure 5) | Refer to diagram | |||
| RS485 Communication Parameters | Baud Rate | 4800/9600/19200/115200bps | |||
| RS485 Communication Parameters | Parity | None | |||
| RS485 Communication Parameters | Data Bits | 8 | |||
| RS485 Communication Parameters | Stop Bits | 1 | |||
| RS485 Communication Parameters | Default Slave Address | 0x01 | |||
| Voltage Output Relationship | Voltage (V) = 1 + Instantaneous Flow (L/min) Voltage Coefficient | Voltage Coefficient: 0.16 (for 25L/min range) | Voltage Coefficient: 0.08 (for 50L/min range) | ||
Pin Definitions:
- Pin 1: Power
- Pin 2: GND
- Pin 3: Voltage Output
- Pin 4: RS485A
- Pin 5: External Output 1 (Upper Limit Alarm)
- Pin 6: External Output 2 (Lower Limit Alarm)
- Pin 7: GND
- Pin 8: RS485B
Lead Wire Definitions:
- White: Power
- Black: GND
- Yellow: Voltage Output
- Red: RS485A
- Gray: External Output 1
- Brown: External Output 2
- Orange: GND
- Green: RS485B
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