Thank you for purchasing and using our company's ultrasonic oxygen concentration / flow sensor. 1, please carefully read the instructions and fully understand the contents of the sensor after operation and maintenance. Improper use may cause damage to the sensor. (no violent impact and falling ground) 2, without the consent of the company, it is strictly prohibited to alter the structure and components of the sensor without authorization. The company is not responsible for any personal safety incidents or sensor abnormalities caused by unauthorized alterations. 3, the specifications and instruction contents of this sensor may be changed due to the technical improvement of the product. 4, this instruction manual must be handed to the actual user of the sensor and stored in it, and placed at any time where the actual user of the sensor can access it. 5, the company has the right to interpret the instructions for the sensor. 2ã??technical parameter Measurement parameters measuring method range Resolution accuracy FLOW Ultrasonic 0-10L/min 0.1L �±0.2L/min O2 Ultrasonic 20.5%-95.6% 0.1% �±1.8%FS 5-45â?? Note: the range can be customized according to customer requirements. Sample gas requirements Water removal (no condensation); dust filtration (