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1. Low-power consumption
2. Output level: High 3.3V / Low 0V
3. Trigger: repeatable trigger (default)
4. Automatic induction: to enter the sensing range of the output is high, people leave the sensor range automatically delay off high, output low. Ultra-small size.
5. Repeatable trigger: the sensor output high, the delay period, if there is human activity in its sensing range, the output will remain high until people leave after the high variable delay Low (automatically extended sensor module detects the human body after every activity a delay period, and the last time an event is the starting point of the delay time).
6. Wide operating voltage range: the default operating voltage DC4.5V-20V.
7. Micropower: quiescent current <50 microamps, especially for battery-powered automatic control products.
8. Output high signal: easy docking and all kinds of circuits.

If You are wandering to Build a Device Which is used to measure the temperature of a hot object like machines, flames, hot iron, device CPU. Then this MLX90614 ESF Non-Contact Human Body Infrared Temperature Measurement Module is Needed for you.

The MLX90614 ESF is an Infra-Red thermometer for non-contact temperature measurements.  Both the IR-sensitive thermopile detector chip and the signal conditioning ASIC are integrated into the same TO-39 can. The Integrated MLX90614 GY-906 is a low noise amplifier, 17-bit ADC, and powerful DSP unit thus achieving high accuracy and resolution of the thermometer.