特点
■寿命长
■*校准
■的*稳定性
■数字输出，串行接口
■尺寸小
■容易使用
■成本低
特点
■寿命长
■*校准
■的*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
PRODUCTSUMMARY
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-100module uses advanced digital signalprocessing and ultrasonic technology
to accuray measure the transmission speedof sound wave in the gas mixture, so it can accuray calculate the gas concentration. The module uses diffusion measurement,thustheflowchangehaslittleeffectonthemeasurement.Digitalsignal output is adapted to microcontroller applications.
产品规格
| 测量范围 | 20.8%~96.0%（O2/N2dry mixedgas） |
| 测量精度 | ±2% |
| 重复性 | Less than ±1%FS |
| 分辨率 | 0.1% O2increments |
| 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 pitchXHWafer（4Pins） |
SERIALINTERFACE
USOM-100 module uses serial interface to receive commands and transmit data, which is ideal for microcontroller applications. User can sendthe following
command via the serial interface to the module, and the concentration can be read fromthe 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 11bytes, 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 from4 to 8 byte. Forexample, the return data is
| 0x55 | 0xAA | 0x7E | 0x04 | 0x4F | 0x43 | 0x03 | 0xB4 | 0x4D | 0xBF | 0x0D |
0x03B4=948, then the concentration is 94.8%
DIMENSIONS
Pin1VDD Pin2TXD 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
