Digoo DG-PC809 - Measurement Principle; Key Features

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3.3 Principle
The infrared temperature sensor collects infrared energy emitted by the eardrum in
the ear canal or the skin of forehead. After being focused by a lens, the infrared energy
is converted into a temperature reading by the thermopiles and measurement circuits.
Fig. 1 Fig. 2
3.4 Features
 Quick measurement, only 1 second
 Accurate and reliable
 One button design, easy to operate
 Both forehead and ear measurement mode
 32 sets of memory, easy to recall
 Switch degrees Celsius (℃) and Fahrenheit (℉)
 Turn on or off thebuzzer/speaker/vibrationfunction
 Lighting an orange LED, intelligent low fever alarm
 Lighting a red LED, intelligent high fever alarm
 Automatic shutdown, energy saving
3.5 Components
The infrared thermometer consists of a shell, a LED display screen, a button, a