Acceleration sensors are mainly used in automotive airbags, anti-lock braking systems, traction control systems, etc. In safety applications, fast response acceleration sensors are very important. It must be quickly determined when the airbag should be released, so the acceleration sensor must react in a split second.

Piezoresistive acceleration sensors are developing the fastest due to their wide application in the automotive industry. The MEAS 40B is a small piezoresistive acceleration sensor with a wide range of accelerations, compliant with the latest SAE J211/J2570 (AUG2009) specification. This acceleration sensor features a built-in mechanical limiter, anodized aluminum housing and flexible cable output. The sensing element is designed with liquid damping to extend the effective frequency range and reduce the effects of undesirable high frequency ringing due to the resonant frequency of the sensor. The MEAS 40B can quickly reach a stable state rather than endless vibration, reducing the response time of the device.