Product Name: Ultrasonic Oxygen Sensor Model No.: Gasboard-8500V-RH Version: V0.2 Date: April 28, 2022

Content First Edition - Changes on accuracy definitions - Replace term “response time” with “data update time” 2 - Change storage temperature condition from “-20~50℃” to “-20~70℃” - Changes on J1 and J2 pin definitions

Ultrasonic Oxygen Sensor Gasboard-8500V-RH Family portable oxygen concentrator, medical concentrator, large oxygen generator. Family ventilator, medical ventilator. The binary gas (include oxygen) detection. Description Gasboard-8500V-RH ultrasonic oxygen sensors is an economical gas sensor used to detect oxygen concentration in binary gases. By adopting ultrasonic detecting technology and principle of TOF (time of flight) measurement, Gasboard-8500V-RH sensor has the advantages of very stable, maintenance-free, no drift, no need routine calibration and no-consuming parts and can be used for...

Specifications Ultrasonic Oxygen Sensor Specifications Sensor Type Detection Method Ultrasonic Technology Data Update Time Working Condition Storage Condition Working Voltage Working Current Average current ≤40mA; Peak current ≤ 50mA Communication Interface 3) Analog Voltage Output 3) UART_TTL (3.3V); IIC (reserved) 200mV-2300mV (0 to 100% O2 concentration) Life Span Concentration measuring range for pure oxygen source is 0 to 100% and for PSA oxygen source is 20.5% to 95.6%. The sensor could withstand flow rate max. 20L/min in mainstream. 8500V-RH is calibrated with pure oxygen source and the...

Drawing 1 Gasboard-8500V-RH Pin Definition Drawing Power & Signal Ground Serial Send / IIC Data (3.3V) Serial Receive / IIC Clock (3.3V) Power Ground Remark: IIC is reserved Connector Description Port

Linearity between Output Signal and Oxygen Concentration Drawing 2 Linearity between Output Signal and Oxygen Concentration Linearity Relationship: O2 and Vout has a linear relationship as below: O2 = 0% → Vout = 200mV O2 = 100% → Vout = 2300mV The corresponding oxygen concentration of the output signal can be calculated by the following formula: O2(%) = [Vout(mV) -200] /21 Example: When output Vout(mV) = 800mV, oxygen concentration is calculated as below: O2(%) = (800-200)/21=28.57 The oxygen concentration is 28.57%.

Reference Circuit Application Scenarios 1: Analog output Drawing 3 Reference Analog Output Connection Circuit Application Scenarios 2: UART TTL 3.3V Drawing 4 Reference UART Communication Connection Circuit

Communication Protocol UART Communication Protocol 1. Protocol Overview 1) Baud Rate: 9600, Data Bits: 8, Stop Bits: 1, Parity: No, Flow Control: No 2) The protocol data are hexadecimal data. For example, “46” is [70] in decimal; 3) [xx] is single byte data(unsigned,0-255); In double byte, the high byte is a head of low byte; 4) The sensor will send data actively by default and the sending interval is 0.5 seconds. The user needs to read more other data, send the corresponding commands directly to the host and the host will respond immediately. 2. Serial Communication Protocol Format PC Send Format...

Communication Protocol Response example: Response: 16 09 01 00 CD 00 00 00 C2 00 1E 33 Explanation: Hexadecimal convert into decimal: CD is 205; C2 is 194 O2 concentration =0*256 + 205=205 (20.5%) O2 temperature value =0*256+194=194 (19.4℃) 4.2 Read the Software Version Number Send: 11 01 1E D0 Response: 16 09 01 DF1-DF8 [CS] Function: Read the module’s firmware version Explanation: DF1-DF8 refers to the ASCII code of particular version number. For example: When module’s firmware version number is 0.02.016, response data: Hexadecimal convert into ASCII code 4.3 Read Sensor Serial Number Send:...

Drawing 5 External Dimension (Unit: mm, Tolerance: ±0.2mm)

Product Code Product Type RH: with humidity compensation Structure Type V: Structure Code Product Application 8500: Oxygen Application Product Category Gasboard: Ultrasonic Oxygen Sensor

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...