GY-US42超声波模块 Pixhawk APM专用超声波模块，I2C接口，即插即用，

直接替代MB1242 MB1240

测量范围：20CM-720CM  （VCC=5V）

  分辨率：1CM 

 响应频率：15HZ(全范围) 

工作电压：3-5V 

 工作电流：9MA(VCC=5V)  

工作温度：-20°-65°

尺寸：21.5*21*24.5

 重量：5克

Maxbotic I2C Sonar Rangefinder

Maxbotic I2C EZ4 sonar (also known as the I2CXL-MaxSonar-EZ4 or MB1242) is a relatively inexpensive, short range (up to 7m) range finder primarily designed for indoor use but which has been successfully used outdoors on Copter.

The EZ4 (recommended) has the narrowest beam providing the best noise resistance while the EZ0 has the widest beam and highest sensitivity. The datasheet can be found here. Additional information on the similar analog version of this sonar can be found here.

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