Difference between IIS3DWB vibration sensor and ISM330DLC?

[RJain.1]

Hi,

I want to know the difference between IIS3DWB and ISM330DLC.

Why we are calling IIS3DWB as vibration sensor while ISM330DLC has accelerometer inside with the same specifications as in IIS3DWB?

Which is better in monitoring the vibration in motors?

Thanks

[Eleon BORLINI]

Hi @RJain.1​ , the IIS3DWB is a stand-alone accelerometer, so it is focused on vibration only: its ODR max is 26.667kHz and so it is nominally capable to detect vibrations in the acoustical range, while ISM330DLC is limited to 6.66kHz, Moreover, one important difference between the two products are the targets applications, specified by the temperature range for which the sensors are qualified and guaranteed. The IIS3DWB has been tested in production to guarantee less than 2% accuracy on sensitivity, and for this reason is capable to get more accurate measures if offset-compensated, but has higher offset and higher temperature variation. IIS3DWB is specialized on high temperature and industrial environments, so can be used on industrial machinery up to 105°C. ISM330DLC is on average more accurate at ambient temperature. Regards

[RJain.1]

Hey @Eleon BORLINI​ ,

Thanks for reply.

I want to monitor vibrations in induction motors which have 3000-10000 RPM. These motors are deployed in warehouses. So, which among these two will be good in this condition so that we can predict the failure.

[Eleon BORLINI · Accepted solution]

Hi @RJain.1​ , supposing a vibration of the same magnitude order of RPMs of the rotating motor, IIS3DWB is the only device able to detect 10kHz vibration, since its ODR is 26.6kHz and the max detectable frequency is ODR/2. Regards

[Chubs]

@Eleon BORLINI this is incorrect, IIS3DWB has a bandwidth of upto 6kHz only. it cannot detect or sense vibrational signature at around 10kHz.