特点
■寿命长
■完全校准
■卓越的长期稳定性
■数字输出，串行接口
■尺寸小
■容易使用
■成本低
应用
■氧气浓缩器
■纯度检测o 2/n 2混合气体
■气体分析仪
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.
产品规格
测量范围
20.8%~96.0% （o2/n2 dry mixed gas）
测量精度
±2%
重复性
less than ±1% fs
分辨率
0.1% o2 increments
环境温度
5~45℃
反应时间
less than 30 seconds
样品气体压力
0~20kpa
样品温度
5~45℃
电流特点
参数
值
供应电压
dc 5v±0.5v
电源电流
less than 60ma
串行接口（电路）
baudrate 19200
data bits 8
stop bits 1
parity none
连接器
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%
dimensions pin1 vdd pin2 txd pin3 rxd pin4 gnd
所有产品的规格和数据不断更新中，不另行通知。
产地：加拿大s-a公司

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珠海莱柏电子科技有限公司
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