SPECIFICATION Product Name: Ultrasonic Flow Senor Version: V1.0 Date: August 01, 2020

Content First Edition

Ultrasonic Flow Sensor Module Gasboard-7500H-OPC Applications  Digital Gas Analysis and Detection Instrument Particle Counter Measurement the Flow of Clean Gas Description Gasboard-7500H-OPC ultrasonic flow sensor is an economical sensor for measuring gas flow in binary gases. Based on the mature gasboard-7500 ultrasonic oxygen sensor module, this sensor has outstanding characteristics of quick response, high accuracy, great stability, no drift, etc. Gasboard-7500H-OPC sensor has full scale matrix humidity compensation, not affected by humidity. This product is very suitable for digital gas...

Specification Ultrasonic Flow Sensor Specification Detect Principle Ultrasonic Technology Detection Range Detection Accuracy Response Time Work Condition Storage Condition Work Voltage Average Work Current Communication Interface Product Size Life Span Remark① Working condition flow, under current temperature, volume flow under current pressure.

Table 1. Connector Pin Definition J2 NO 4.75-12.6V, External Power Supply Input Pin 4.75-12.6V, External Power Supply Input Pin Power Supply Input Power Input Table 2. Connector Description Port

Reference Circuit Application Scenarios: UART 3.3V Output Drawing 2 UART Communication Connection Circuit

Communication Protocol UART Communication Protocol 1. 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; Baud Rate: 9600, Data Bits: 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 Description Protocol Format Start Symbol PC sending is...

Communication Protocol Response Example: Response: Instruction: Hexadecimal Convert into Decimal: Gas Flow Value=(1*256+27)/100=2.83 (L/min) Temperature Value= (0*256+194)/10=19.4 (℃) 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:...

Product Code Instruction Product Type OPC: Product Type Structure Type H: Structure Type ※ Product Application 7500: Civilian Areas ※ Product Category Gasboard: Ultrasonic Gas Sensor

Reliability Testing Item Indoor temperature requirement: 25±2℃, humidity（50±10）%RH, after the sensor connect Make new tests in different oxygen with serial port and power on, switch over the flow in 3L/min、5L/min、8L/min respectively criterion. to make measurement of oxygen concentration and accuracy. flow, all can meet deviation Flow Performance 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℃,...

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 air outlet. (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 necessary compensations, please do not use the sensor in the environments of high humidity water...