The Dytran 7504A1 is a high precision single axis variable capacitance (VC) accelerometer available with a range of 2g. These high performance accelerometers combine an integrated VC accelerometer chip with high drive, low impedance buffer for low level acceleration measurements.
加速度传感器是一种能够测量加速力的电子设备。加速力就是当物体在加速过程中作用在物体上的力，就好比地球引力，也就是重力。加速力可以是个常量，比如g，也可以是变量。加速度计有两种：一种是角加速度计，是由陀螺仪（角速度传感器）的改进的。另一种就是线加速度计。
Tailored for zero-to-medium frequency applications, the model 7504A1 features a low end frequency response of 0 Hz (DC) and upper frequency range of 400 Hz. This module contains a MEMS capacitive sensing element, a custom integrated circuit amplifier, and differential output, packaged in a rugged aluminum housing weighing 20 grams. Units incorporate an integral 5-foot cable assembly terminating to flying leads and are easily mounted via two 8-32 screws. On board regulation is provided to minimize the effects of supply voltage variation, and the model 7504A1 is relatively insensitive to temperature changes and thermal gradients.
压电式加速度传感器又称压电加速度计。它也属于惯性式传感器。压电式加速度传感器的原理是利用压电陶瓷或石英晶体的压电效应，在加速度计受振时，质量块加在压电元件上的力也随之变化。当被测振动频率远低于加速度计的固有频率时，则力的变化与被测加速度成正比。
