Product Overview
The Aosong AFM3020 is a high-precision gas flow sensor designed for demanding applications, particularly in medical ventilation and respiratory systems. It accurately measures the flow of air, oxygen, and other non-corrosive gases with low pressure loss, ensuring optimal performance in critical environments. The sensor operates on a 5V supply voltage and features a digital I2C interface, providing calibrated and temperature-compensated measurements. Its advanced technology, based on a thermal sensing chip and a 24-bit CMOS microprocessor, ensures fast signal processing and superior accuracy compared to similar products. The AFM3020 is suitable for a wide range of applications including medical, process automation, burner control, fuel cell control, spectroscopy, environmental monitoring, and laboratories.
Product Attributes
- Brand: Aosong
- Origin: Guangzhou, China
- Certifications: RoHS, REACH
- Material Composition: PPE+PS mixture (medical grade: biocompatible; ISO 10993 or USP Class VI), Silicone, Silicon Nitride, Silicon Oxide, Platinum, Gold, Epoxy, Polyurethane, Stainless Steel
- Weight: < 25 grams
Technical Specifications
| Parameter | Condition | Value | Unit | Notes |
|---|---|---|---|---|
| Sensor Performance | ||||
| Flow Range | Air/N2/O2 | -10 to +200 | slm | AFM3020-200 model is 200slm range. |
| Accuracy | Span (Max) | 4 | % of reading | Includes offset, nonlinearity, hysteresis. |
| Span (Typical) | 2.5 | % of reading | Includes offset, nonlinearity, hysteresis. | |
| Offset | Max | 0.1 | slm | |
| Typical | 0.05 | slm | ||
| Repeatability | Span (Max) | 1 | % of reading | Whichever is greater. |
| Span (Typical) | 0.5 | % of reading | Whichever is greater. | |
| Noise Level | Span (Max) | 1 | % of reading | Whichever is greater. |
| Span (Typical) | 0.5 | % of reading | Whichever is greater. | |
| Accuracy Shift due to Temp. Change | Span (Max) | 0.75 | % of reading/10 | |
| Span (Typical) | 0.25 | % of reading/10 | ||
| Offset Shift due to Temp. Change | Max | 0.0 | slm | |
| Typical | 0.0 | slm | ||
| Position Sensitivity | Non-horizontal position | < 0.05 | slm | |
| Medium Compatibility | Calibrated | Air, N2, O2 | ||
| Media Compatibility | Air (non-condensing), N2, O2, non-corrosive gases | |||
| Electrical Characteristics | ||||
| Supply Voltage (VDD) | 4.75 - 5.25 | V | ||
| I2C Operating Level | High | 4 - VDD | V | |
| I2C Operating Level | Low | - 0.8 | V | |
| Sampling Period | 10 | ms | ||
| Power Consumption | Measuring | 7.5 - 10 | mA | |
| I2C Communication Speed | 100 - 400 | Kb/s | ||
| Operating Temperature | 0 - +60 | |||
| Storage Temperature | 0 - +60 | |||
| Operating Pressure Range | Absolute | 0.7 - 1.3 | bar | |
| Overpressure (Measurement) | +0.2 | bar | ||
| Burst Pressure (Measurement) | > 1 | bar | ||
| Flow Coefficient | Air/N2 | 140 | 1/slm | |
| Flow Coefficient | O2 | 142.8 | 1/slm | |
| Offset | 32000 | |||
| Dimensions | ||||
| External Dimensions | (L x W x H) | Refer to Figure 4 | mm | |
| Model List | ||||
| Model | Flow Range | Unit | ||
| AFM3020-20 | 0-20 | slm | ||
| AFM3020-50 | 0-50 | slm | ||
| AFM3020-100 | 0-100 | slm | ||
| AFM3020-150 | 0-150 | slm | ||
| AFM3020-200 | 0-200 | slm | ||
2205111530_Aosong-AFM3020_C3012645.pdf
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