The SpO2 meter includes three main parts: probe, function module and display part. For most monitors on the market, the technology for detecting SpO2 is already very mature. The accuracy of the SpO2 value detected by a monitor is largely related to the probe.
（1）Detection device: The light-emitting diode and photodetector device that detect the signal are the core components of the probe. It is also the key to determining the accuracy of the detection value. In theory, the wavelength of red light is 660nm, and the value obtained when infrared light is 940nm is ideal. However, due to the complexity of the manufacturing process of the device, the wavelength of the red light and infrared light produced is always deviated. The magnitude of the deviation of the light wavelength will affect the detected value. Therefore, the manufacturing process of light-emitting diodes and photoelectric detection devices is very important. R-RUI uses Fulco’s testing equipment, which has advantages both in accuracy and reliability.
（2）Medical wire: In addition to using imported materials (reliable in terms of high elastic strength and corrosion resistance), it is also designed with double-layer shielding, which can suppress noise interference and keep the signal intact compared with single-layer or no shielding.
（3）Soft pad: The probe produced by R-RUI uses a specially designed soft pad (finger pad), which is comfortable, reliable, and non-allergenic in contact with the skin, and is suitable for patients of different shapes. And it uses a fully-wrapped design to avoid interference caused by light leakage due to finger movements.
（4）Finger clip: The body finger clip is made of fire-resistant non-toxic ABS material, which is strong and not easy to damage. A light-shielding plate is also designed on the finger clip, which can better shield the peripheral light source.
（5）Generally, one of the main reasons for SpO2 damage is that the spring is loose, and the elasticity is not enough to make the clamping force insufficient. R-RUI adopts high-tension electroplated carbon steel spring, which is reliable and durable.
（6）Terminal: In order to ensure the reliable connection and durability of the probe, consider the attenuation in the signal transmission process on the connection terminal with the monitor, and adopt a special process gold-plated terminal.
（7）Connection process: The connection process of the probe is also very important to the test results. The positions of the soft pads have been calibrated and tested to ensure the correct positions of the transmitter and receiver of the test device.
（8）In terms of accuracy, ensure that when the SpO2 value is 70%-100%, the error does not exceed plus or minus 2%, and the accuracy is higher, so that the detection result is more reliable.
Post time: Apr-14-2021