oxygen concentrator sensor

Specifications 1.Long life&Fully calibrated;

2.Excellent long term stability;

3.Digital output&serial interface;

PRODUCT SUMMARY:   PRINCIPLE-The speed of ultrasonic wave through a gas is a function of its effective molecular weight and the temperature of the gas. If the gas consists of only two variable components, nitrogen and oxygen, the oxygen concentration is a function of the effective molecular weight and the molecular weight of oxygen and nitrogen. Accordingly, the oxygen concentration of the gas can be calculated by measuring the temperature and propagation delay of the ultrasonic wave across the two transducers while the gas passes between the transducers.    USOM-100 module uses advanced digital signal processing and ultrasonic technology to accurately measure the transmission speed of sound wave in the gas mixture, so it can accurately calculate the gas concentration. The module uses diffusion measurement, thus the flow change has little effect on the measurement. Digital signal output is adapted to microcontroller applications.   APPLIACATIONS: 1.Oxygen concentrators 2.Purity detect of O2/N2 mixed gas 3.Gas analyzers   PRODUCT SPECIFICATIONS:

Measurement Rang	20.8%~96.0% (O2/N2 dry mixed gas)
Measurement Accuracy	±2%
Repeatability	Less than ±1% FS
Resolution	0.1% O2 increments
Ambient Temperature	5~45°C
Response Time t90	Less than 30 seconds
Sample Gas Pressure	0~20kPa
Sample Gas Temperature	5~45°C

  ELECTRICAL CHARTACTERISTICS:

Parameters	Values
Supply Voltage	DC 5V±0.5V
Supply Current	Less than 60mA
Serial Interface(TTL)	Baudrate    19200 Data Bits     8 Stop Bits     1 Parity       None
Connector	2.54mm pitch XH Wafer(4 Pins)

  SERIAL INTERFACE   USOM-100 module uses serial interface to receive commands and transmit data, which is ideal for microcontroller applications. User can send the following command via the serial interface to the module, and the concentration can be read from the receive data. Send command:

0x55

0xAA

0x7E

0x02

0x4F

0x43

0x94

0x0E

0x0D

Return data format:

0x55

0xAA

0x7E

0x04

0x4F

0x43

MSB

LSB

SUM

XOR

0x0D

Return data consist of 11 bytes, of which 7, 8-byte is value for the concentration, it is 10 times of its real value in %. The 9, 10-bytes are SUM and XOR values from 4 to 8 byte. For example, the return data is

0x55

0xAA

0x7E

0x04

0x4F

0x43

0x03

0xB4

0x4D

0xBF

0x0D

0x03B4=948, then the concentration is 94.8%