SPECIFICATION Product Name：Ultrasonic Oxygen Sensor Version: V1.1 Date: October 12, 2020

Content First Edition Change concentration accuracy from ±1.8%FS to ±1.5%FS Change flow rate accuracy from 0.1-0.3% to ±0.2% Change picture to front review Reviser Date

Ultrasonic Oxygen Sensor Gasboard-7500K Applications Family and Medical Oxygen Concentrator/Generator Measurement the Flow and Concentration of Clean Gas Gas Detection in Binary Gas (Including O2) Description The gasboard-7500K ultrasonic oxygen sensor is an high performance-cost-ratio sensor for measuring oxygen flow and concentration in binary gases. Based on the mature ultrasonic detecting technology, this sensor has great performances of self-calibration, maintenance-free, no drift. This sensor also has full range matrix temperature compensation, can detect the flow and concentration of binary...

Specification Ultrasonic Oxygen Sensor Specification Ultrasonic Technology Detect Principle Detection Range Detection Accuracy Response Time Work Condition Storage Condition Work Voltage Average Work Current Communication Interface Product Size Life Span Remark① Oxygen concentration detection range 20.5%~95.6% is calibrated with PSA oxygen source. If use 99.99% pure oxygen as oxygen source, should add a coefficient to make a transfer, the formula is: Target concentration = (sensor reading * 1.142) - 3.42 Oxygen concentration detection range 20.5%-100% calibrated with 99.99% pure oxygen is also...

12VDC, External Power Supply Input Pin External Power Supply Input Pin, 4.75-12.6V Power Supply Input Power Supply Output J1 External Power Supply Input Pin 3.3V 0V-2.5V Output Pin, 0V Corresponds to 0%Vol Oxygen Concentration; 2.5V Corresponds to 100%Vol Oxygen Concentration 0V-2.5V Output Pin, 0V Corresponds to Flow Rate of 0L/min 2.5V Corresponds to Flow Rate of 10L/min Power Ground Power Ground Remark: this function needs to be customized. Remark：this function needs to be customized. Connectors Type Port

Reference Circuit Application Scenarios： UART TTL 5 V Output Drawing 2 UART Communication Connection Circuit

Communication Protocol UART Communication Protocol 1. Protocol Overview Baud Rate：9600, Data Bits: 8, Stop Bits: 1, Parity: No, Flow Control: No The protocol data are hexadecimal data. For example, “46” is [70] in decimal； [xx] is single byte data(unsigned，0-255); In double byte, the high byte is in front of low byte； The default is active sending, and the sending cycle is 0.5 seconds. If you need to read more other data, send the corresponding command directly to the host, and the host responds immediately. Serial Communication Protocol Format PC Send Format Start Symbol Protocol Format Description...

4.2 Read the Software Version Number Send ：11 01 1E D0 Response ：16 09 01 DF1-DF8 [CS] Function ：Read the software version number Instruction ：DF1-DF8 refers to the ASCII code of particular version number For Example: When module version number is 0.02.016, response data: Hexadecimal Convert into ASCII Code: 4.3 Inquiry Instrument Serial Number Send ：11 01 1F CF Response ：16 0B 1F（SN1）（SN2）（SN3）（SN4）（SN5）[CS] Function ：：Read version number for module firmware Explanation ：Instrument serial number of output software. SNn range is 0~9999，5 integer type constitute 20 serial number 4.4 Open reading...

Reliability Testing Item Indoor temperature requirement：25±2℃，humidity（50±10）%RH, after the sensor connect Flow Performance with serial port and power on, switch over the flow in 3L/min、5L/min、8L/min respectively to make measurement of oxygen concentration and accuracy. Make new tests in different oxygen flow, all can meet deviation Storing the sensor for 96H with no power under -20℃±2℃ environment condition, then After staying under normal temperature condition for 2 hours, the test the measuring deviation under normal temperature condition. Indoor temperature requirement：-10±2℃, test the measuring...

Product Code Instruction ※ Structure Type K: Structure Serial Number ※ Product Application 7500：Civilian Areas ※ Product Category Gasboard: Ultrasonic Oxygen Sensor

Packing Information Carton Dimension Packing Material Anti-static Plastic Tray

User Attention Please pay attention to below: (1) Install the sensor as far away as possible from the heat source and heat dissipation outlet of the compressor, and install the sensor as close as possible to the oxygen outlet, and install a one-way valve to prevent the water from humidifying glass from entering sensor. (2) In order to ensure reliability and long service life, do not use or store the sensor in a place where the temperature is higher than the rated temperature, and do not use the sensor in an environment where the voltage is higher than the rated voltage of the sensor. (3) Without...