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Cubic Sensor and Instrument Co.,Ltd
Ultrasonic Gas Flow and Oxygen Sensor

Ultrasonic Gas Flow and Oxygen Sensor

Product catalog summary

Introduction to Ultrasonic Technology
Ultrasonic technology involves sound waves with frequencies above 20,000 Hz. It is known for its directional capabilities, penetration ability, and high energy concentration, making it suitable for various applications such as distance measurement, speed detection, cleaning, welding, and sterilization. In the context of gas flow and concentration measurement, ultrasonic pulses are used to detect differences in travel time between upstream and downstream directions, allowing for the determination of gas flow rates and concentration ratios.

Comparison of Detection Methods
The document compares ultrasonic detection with zirconia and electrochemical methods for oxygen concentration measurement. Ultrasonic detection offers continuous monitoring without consumption, a lifespan of over five years, and minimal temperature effects. It requires no recalibration and is suitable for binary gas environments. In contrast, zirconia and electrochemical methods have shorter lifespans, require frequent calibration, and are less suitable for continuous monitoring.

Features of Gasboard-7500
The Gasboard-7500 is a compact ultrasonic gas flow and oxygen sensor designed for small oxygen generators. It measures oxygen concentration and flow simultaneously, with outputs displayed on an LCD. The sensor is noted for its long life, measurement stability, and high accuracy, making it ideal for oxygen system monitoring.

Specifications
The sensor has dimensions of 120mm x 20.3mm x 13mm and weighs 25g (excluding LCD). It features RS-232, LCD, and voltage outputs, with analog outputs for gas flow and concentration. The power supply is 12VDC/10mA, with precision levels of ±1.8%FS for concentration and ±0.2L/min for flow. The measurement range is 0-100% for concentration and 0-10.0L/min for small gas concentrators. The sensor operates within a temperature range of 10-45°C and does not require recalibration.

Applications
The Gasboard-7500 is suitable for use in oxygen generators, respirators, oxygen volume charge meters, anesthetic apparatus, baby oxygen positions, and high-pressure oxygen storage systems.

Interface and Output
The sensor includes interfaces for power supply, linear output, and serial communication. The power supply interface requires a 12V input, while the linear output interface provides a 0-5V output corresponding to flow and O2 measurements. The serial interface requires a TTL level converter for computer connections.

Catalog excerpts

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What’s ultrasonic? Ultrasonic is the frequency above 20,000 Hz of sound waves, it is a good direction, penetrating ability, and easy to obtain a higher concentration of sound energy, across far distance in water, can be used for distance, speed, cleaning, welding, gravel, Sterilization and so on. It has many applications in medical, military, industrial, agriculture ect. Theory of ultrasonic flow and concentration : in the pipeline full of fluid, the ultrasonic pulse transmitted by the fluid , the downstream direction and counter-current direction have different travel time, different gas flow...

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Gasboard-7500 ultrasonic gas flow and oxygen sensor use the ultrasonic velocity difference between upstream and downstream to detect the gas flow and also the oxygen purity for oxygen concentrator. It is reliable and low cost for integration into the person or medical oxygen concentrator.

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Feature ■ Compact shape, especially for small oxygen generator measurements ■ Measurement of oxygen concentration and flow simultaneous, LCD display output. ■ Adopt the measurement principle of the relation beween ultrasonic propagation velocity in the gas and the gas concentration, online testing, long life (more than 5 years), measurement stability, high accuracy. ■ Most able to meet the need of oxygen system for monitoring concentration. The produced by our company is still exclusive, better function, low price.

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Application ■ Oxygen Generator ■ Respirator ■ Oxygen volume charge meter

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Anesthetic Apparatus Baby oxygen position High-pressure oxygen stor

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Alarm light singal output Fixed hole Linearity output power supply

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Ultrasonic Gas Flow and Oxygen Sensor-10

◆Power Supply Interface J5: Voltage of 12V, ◆ Linear output interface J1: Output voltage 0 ~ 5V, with the flow and O2 corresponding linear measurements. When the voltage is 0V, the output to 0; when the voltage is 5V, the corresponding output is full scale. ◆ Serial Interface J2: is the TTL level, not directly connected with the calculation serial port. If the connection with the computer, you need to take special serial converter (TTL switch to RS232). Serial can read the measurements by the sensor and maintenance the sensor. Oxygen monitor interface shows LCD display DC12V power supply to flow...

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