MPU-6050 sensor contains a MEMS accelerometer and a MEMS gyro in a single chip. It is very accurate, as it contains 16-bits analog to digital conversion hardware for each channel. Therefor it captures the x, y, and z channel at the same time. The sensor uses the I2C-bus to interface with the Arduino..
Break-out board for ADXL345 3-axis accelerometer requires low power with a high resolution of 13 bits.It has a programmable range of resolution specially +/-2g,+/-4g,+/-6g,+/-8g and +/-16g. Specifications :Power Input3.3VDCAccelerometer ChipADXL345Programmable Resolution Range+/-2g,+/-4g,+/-6g,..