ShenzhenYijiajie Electronic Co., Ltd.
| Delivery Time | 5-8 days |
| Power supply voltage | 3-10 VDC |
| Output interface | I2C |
| Supply Ability | 1500 |
| Payment Terms | L/C, D/A, D/P, T/T, , |
| Accuracy | ±0.5% FS |
| Resolution | 0.002 SLPM |
| Response time | ≤1 ms |
| Range | 0-20 SLPM |
| Repeatability | ±0.1% FS |
| Packaging Details | Box pack |
| Power consumption | 25 mW |
| Model Number | HAFUHM0020L4AXT |
| Brand Name | YJJ |
| Place of Origin | USA |
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Product Specification
| Delivery Time | 5-8 days | Power supply voltage | 3-10 VDC |
| Output interface | I2C | Supply Ability | 1500 |
| Payment Terms | L/C, D/A, D/P, T/T, , | Accuracy | ±0.5% FS |
| Resolution | 0.002 SLPM | Response time | ≤1 ms |
| Range | 0-20 SLPM | Repeatability | ±0.1% FS |
| Packaging Details | Box pack | Power consumption | 25 mW |
| Model Number | HAFUHM0020L4AXT | Brand Name | YJJ |
| Place of Origin | USA | ||
| High Light | medical thermal mass flow sensor ，0-20SLPM flow sensor ，electronic pressure sensor with warranty | ||
Product Description:
YJJ HAFUHM0020L4AXT Thermal Mass Flow Sensor 0-20SLPM for Medical Applications
Features:
I. Core Parameters (25℃, 1 atm, air)
Model: HAFUHM0020L4AXT
Measurement medium: Dry, clean, oil-free air / non-corrosive gas
Range: 0–20 SLPM (standard liters per minute)
Accuracy: ±0.5% FS (full scale), ±0.5% reading
Repeatability: ±0.1% FS
Resolution: Up to 0.002 SLPM
Response time: ≤ 1 ms (fast dynamic)
Output interface: I2C (digital), slave address 0x49, 3.3V level
Power supply voltage: 3–10 VDC (typical 3.3V/5V)
Power consumption: Static approximately 25 mW, maximum ≤ 60 mW
Operating temperature: -20℃ to +70℃; medium compensation 0℃ to +50℃
Pressure resistance: Maximum 60 psi (≈4 bar)
Interface: 22 mm conical male connector (ISO 5356), quick-insert type
Package: 6-pin SIP connector, flame-retardant thermoplastic housing
Certification: RoHS compliant, medical-grade insulation and anti-interference
II. Model Interpretation (HAFUHM0020L4AXT)
HAF: Zephyr series
U: Universal type
HM: High precision + small range channel (different from HH/HT)
0020: Full scale 20 SLPM
L4: I2C output, 22mm quick-insert interface
AXT: Standard configuration, no special options
III. Working Principle
Using MEMS thermal microbridge:
Chip integrates insulation heating resistor + upstream and downstream temperature sensing resistors;
Airflow removes heat, the temperature difference upstream and downstream ∝ mass flow rate;
Built-in ASIC completes temperature compensation, linearization, digitization, and outputs I2C;
Directly measures mass flow rate, unaffected by temperature / pressure fluctuations.
IV. Main Applications (Low-flow high-precision scenarios)
Medical equipment:
Precise control of oxygen / air mixture ratio in ventilators / anesthesia machines
Low-flow monitoring for pulmonary function instruments, nebulizers (0–20 SLPM)
Industrial automation:
Precise gas ratioing (such as welding shielding gas, inert gas)
Leak detection equipment, gas analyzer low-flow calibration and stability
Environmental monitoring:
Low-flow closed-loop control for air sampling pumps, VOC analyzers
Research and laboratory:
Micro-flow measurement for gas pipelines, precision pneumatic equipment
Appliances / fresh air:
High-end air purifiers, medical-grade fresh air with low flow feedback
Specifications:
| Measurement range | 0–20 SLPM |
| Operating temperature | -20℃ to +70℃ |
| Medium compensation | 0℃ to +50℃ |
| Pressure resistance | Maximum 60 psi |
| Interface size | 22 mm |
| Package | 6-pin SIP |
Company Details
Business Type:
Manufacturer,Trading Company
Year Established:
2006
Total Annual:
900000-1000000
Employee Number:
50~80
Ecer Certification：
Verified Supplier
Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, ph... Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, ph...
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