Accelerometer for use in boat engine

[Central SUPPORT]

I have been asked to embed an accelerometer into the engine control module. It would normally be used when the engine is not running to determine static angle with respect to gravity; low G, angle sensor.

However, once the engine starts running there will be significant vibration, the controller is mounted to the engine. For discussion purposes it may be considered 10 g random, up to about 3000 Hz. The specification indicates the normal operating ranges and then indicates a couple of shock type accelerations (absolute maximums). But these are very short duration (3000 g, 0.5 ms) or (10000 g for 0.1 ms).

Which of your MEMS devices would you recommend if exposed to continuous 10 g random vibration? 15 g? 20 g?

NOTE: This question and answer originated from a customer support case which was handled by us. We regularly review support cases and add any helpful ones here for all to benefit from.

[Central SUPPORT · Accepted solution]

There is no problem to have accelerometer to experience 10g/20g event constantly. The part is designed to sustain 10kg shock. 

For marine application, it is recommended to use automotive grade part for longevity and high quality. Please consider AIS328DQTR (+-2g for sensing gravity, tilt angle). Alternatively, consider our industrial part, IIS328DQ (also longevity). For lowest cost part use LIS2DH12.