User's Manual

Fingertip Pulse Oximeter V2.0C318
7
CHAPTER 1 General Information
The pulse oximeter is integrated with Bluetooth
®
technology allowing the user to transfer measurement data
any time and anywhere. The oximeter is designed with the measurement, storage, review, audible and visible
alarms, vibration alert and data transmission function (optional).
Note:The illustrations used in this manual may differ slightly from the appearance of the actual product.
1.1 Measuring principle
Principle of the oximeter is as follows: An experience formula of data process is established taking use of
Lambert Beer Law according to Spectrum Absorption Characteristics of Reductive hemoglobin(HbR) and
Oxyhemoglobin (HbO
2
) in red light and near-infrared light zones. The photoelectric oxyhemoglobin inspection
technology is adopted in accordance with capacity pulse scanning and recording technology, so that two
beams of different wavelength of lights (660nm red light and 940nm near infrared light) can be focused onto
human nail tip through perspective clamp finger-type sensor. Then measured signal can be obtained by a
photosensitive element, information acquired through which will be shown on two groups of LEDs through
process in electronic circuits and microprocessor.
Diagram of Operation Principle：
1. Red and Infrared light emission diodes
2. Red and Infrared photodiode
Fig.1