YJJ HAFUHH0050L4AXT MEMS Thermal Mass Flow Sensor for Medical Use 0-50SLPM

Product Description:

YJJ HAFUHH0050L4AXT MEMS Thermal Mass Flow Sensor for Medical Use 0-50SLPM

Features:

I. Core Parameters (25℃, 1 atm)

Model: HAFUHH0050L4AXT

Measurement medium: Dry and clean air / Non-corrosive gas

Range: 0–50 SLPM (resolution up to ±0.05 SLPM)

Accuracy: ±0.5% FS (full scale), ±0.5% reading

Repeatability: ±0.1% FS

Response time: ≤ 1 ms (rapid dynamic measurement)

Output interface: I2C (digital), 3.3V level

Power supply voltage: 3–10 VDC (typical 3.3/5V)

Power consumption: Static approximately 25 mW, maximum ≤ 60 mW

Operating temperature: -20℃ to +70℃; medium compensation 0℃ to +50℃

Pressure resistance: Maximum 60 psi (approximately 4 bar)

Interface size: 22 mm conical male connector (pneumatic quick-connect)

Package: 6-pin SIP connector, flame-retardant thermoplastic housing

Life: >5 years (normal operation), RoHS compliant

II. Working Principle

Uses MEMS thermal microbridge technology:

Chip includes an insulated heating resistor + upstream and downstream temperature sensing resistors;

Air flow removes heat, and the temperature difference between upstream and downstream is proportional to the mass flow rate;

ASIC chip completes temperature compensation, linearization, digitization, and outputs I2C signal;

Directly measures mass flow rate, unaffected by temperature / pressure fluctuations.

III. Main Applications

Medical equipment: Oxygen / air flow precise control for ventilators, anesthesia machines, pulmonary function instruments;

Industrial automation: Gas ratioing, welding shielding gas, leak detection equipment, gas mass flow monitoring;

Environmental monitoring: Air sampling pump flow calibration, gas analyzer flow stability;

Appliances / fresh air: High-end fresh air systems, air purifiers with closed-loop wind volume control;

Research instruments: Laboratory gas pipelines, precision pneumatic equipment flow measurement.

Specifications: