This product is an ultrasonic oxygen concentration and flow detection module designed to measure oxygen concentration and flow rate in binary gas mixtures. The built-in algorithm accurately calculates oxygen concentration and flow by analyzing the forward and reverse travel speeds of ultrasound within the airflow. It also includes temperature compensation function, making it suitable for applications such as oxygen concentrators and ventilators.
The product includes two ultrasonic transducers, an air intake, and an air outlet.
It calculates the current oxygen concentration and flow by measuring the Time of Flight (ToF) of forward and reverse signals transmitted and received by two ultrasonic transducers, as the binary gas mixture enters the airflow tube through the air intake (detects automatically every 500ms).
PIN DESCRIPTION
Pin
Name
Function
1
VDD
MCU positive power
2
G
Green LED output (O2 ≥ 82%)
3
VDD
Positive power
4
Y
Yellow LED output (50% < O2 < 82%)
5
VDD
Positive power
6
Y
Red LED output (O2 ≤ 50%)
7
GND
Ground
8
GND
Ground
9
NC
—
10
VIN
Module positive power
11
GND
Ground
12
TX
UART: TX
13
RX
UART: RX
14
VIN
Module positive power
Rear side of the product
Name
Description
J1
Power input interface
J1-0
Power input interface
J2
Digital signal output interface
J2-0
Digital signal output interface
J3
Programming interface
J4
LED output interface
RESOURCES
MCU: Holtek HT32F65240, 32-Bit Arm® Cortex®-M0+ MCU, including datasheet, package information, etc.
