The InvenSense MPU-6050 sensor contains a 3 Axis MEMS accelerometer and a 3 Axis 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.
InvenSense MPU-6050 with MEMS accelerometer and MEMS gyro
3 Axis Accelerometer, 3 Axis Gyrometer
Hooks up with Arduino Board and Other Maker Kits
I2C Based communication with the development board