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US-100 Ultrasonic Sensor Module With Temperature Compensation Range Distance 450cm
 
This US-100 ultrasonic module can realize 2 ~ 450cm of non-contact ranging function, has 2.4 ~ 5.5 V of wide voltage input range, static power consumption is less than 2mA. Their own temperature sensor will revise the ranging and has many communication modes like GPIO, serial ports etc, just like watchdog inside, very stable and reliable.

 

The US-100 is very similar to the popular HC-SR04 ultrasonic sensors, and even looks the same, but has a few extra tricks.