Item Type: Measuring Module <br>Processor: On board STM8S 103 high performance microprocessor. <br>Display: With digital tube display. <br>Output: Data can be output through the serial port. <br>Effective Measuring Distance: Approx. 3 ~ 400cm / 1.18 ~ 157.48in <br>Display Unit: cm <br>Maximum Error: About 1%. <br>Working Voltage: 5V <br>Board Size: Approx. 24.2 x 35.1mm / 0.95 x 1.38in<br>1、Ranging Board: This measuring board has a 3cm to 400cm effective measuring distance to simplify the ranging. <br>2、Control Chip: Adopting on board STM8S 103 high performance microprocessor, whose program has down burning. <br>3、High Accuracy: The maximum error of ultrasonic measurement is about 1%, very easy and efficient in measuring. <br>4、Wide Utility: Can be used for distance measurement and testing the performance of HC?SR04 ultrasonic module. <br>5、Simple Using: Equipped with output serial port and display digital tube, the operation is very convenient.1. When measuring the distance, the area of the object to be measured should be no less than 0.5 square meters and should be as flat as possible and have a good reflection ability, otherwise it will affect the test results. <br>2. The effective measuring distance is 3cm to 400cm. Exceeding this range may result in inaccurate data or display 000.1 x Measuring Module