YJJ HAFUHT0050L4AXT MEMS Thermal Mass Flow Sensor 0-50SLPM for Medical / Industrial Applications

Product Description:

YJJ HAFUHT0050L4AXT MEMS Thermal Mass Flow Sensor 0-50SLPM for Medical / Industrial Applications

Features:

I. Core Parameters (25℃, 1 atm)

Model: HAFUHT0050L4AXT

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

Range: 0–50 SLPM (Standard liters per minute)

Accuracy: ±0.5% FS (Full Scale)

Resolution: Minimum 0.002 SLPM

Response time: ≤1 ms (Fast dynamic measurement)

Output interface: I2C (Digital), Slave Address 0x49, 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: G3/8 internal thread (ISO 1179), compatible with ISO 5356 connector

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

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

II. Model Interpretation (HAFUHT0050L4AXT)

HAF: Zephyr Series

U: General-purpose

HT: High precision + Threaded interface (Different from HH's quick insertion)

0050: Full-scale 50 SLPM

L4: I2C output, G3/8 thread port

AXT: Standard configuration, no special options

III. Working Principle

Using MEMS thermal microbridge technology:

The chip has an insulated heating resistor + upstream and downstream temperature sensors;

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

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

Direct measurement of mass flow rate, unaffected by temperature / pressure fluctuations.

IV. Main Applications

Medical equipment: Respirators, anesthesia machines, pulmonary function meters for precise oxygen / air flow control;

Industrial automation: Gas mixing, 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 for closed-loop control of air volume;

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

Specifications: