Alert Stresslocator Oximeter – User's guide version 2
Specifications
Bluetooth
version 4.0
BLE - Bluetooth Low Energy
Measurement Range
Spo2: 35~100 %
Accuracy: ± 2 % (80~100 %); ± 3 % (70~79 %)
Pulse Rate: 25~250 BPM
Accuracy: ± 2 bpm
Environment
Temperature
Working: 5~40 °C
Storage:- 10~50 °C
Humidity
Working: 15~80%
Storage: 10~90%
Product description
The Alert Stresslocator Oxieter measures blood oxygenation and heart rate. The device is optical-
based - two beams of different vawelenght of light screen the blood vessels and capillaries of your
finger; more precisely of the nail tip, and that through the finger sensor.
Results showing 96% - 99% are considered to be normal. Greater height above sea level and other
factors may affect the measurement results.
Measurement Principle
Operation principle of the instrument is 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 glow 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.
Arterial oxygen saturation is measured by a method called pulse oximetry. It is a continuous, non-
invasive method based on the different spectra absorption of hemoglobin and oxyhemoglobin
(called spectrophotometer principle). It measures how much light, sent from light sources on the
other side.
Diagram of Operation Principle
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