Vibration Sensor: What Does "g" Mean?

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SUMMARY

The discussion focuses on the meaning of "g" in the context of vibration sensors, specifically accelerometers. "g" represents the standard acceleration due to gravity, quantified as 9.80665 m/s². The sensor in question is a 100g unit with a sensitivity of 20 mV/g, indicating that it outputs 20 millivolts for every g of acceleration measured. For applications requiring higher resolution at lower acceleration ranges, a sensor with greater mV/g sensitivity is recommended.

PREREQUISITES
  • Understanding of accelerometer functionality
  • Familiarity with units of measurement in physics, specifically acceleration
  • Knowledge of voltage output in sensor technology
  • Basic concepts of vibration analysis
NEXT STEPS
  • Research "accelerometer sensitivity" to understand its impact on measurement accuracy
  • Explore "vibration sensor types" to differentiate between accelerometers and direct vibration sensors
  • Learn about "signal conditioning for accelerometers" to improve data interpretation
  • Investigate "calibration techniques for accelerometers" to ensure accurate readings
USEFUL FOR

This discussion is beneficial for engineers, technicians, and researchers involved in sensor technology, vibration analysis, and those seeking to optimize the performance of accelerometers in various applications.

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I am reading a vibration sensor manuvall that always written in units of "g". what is the meaning of that g. Can some explain me. The document is down here.
 
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It's an accelerometer, not a DIRECT vibration sensor, so it's not outputting position or displacement but acceleration.

It's in terms of "g", meaning the standard acceleration of free fall (gravity) here on earth. Simply put it's displaying acceleration where 1 unit is equal to 9.80665 m/s*s.
 
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The sensor i have is a 100g unit and its sensitivity is 20mV per g. More,if i have a 2g unit which can give more higher output. These words are written to me by a sensor vendor. I don't understand these as well. I am new to these vibration sensor. can some explain me in simple way.
 
That just tells you how many milli-Volts the accelerometer will output per g measured. The 20 mV/g sensitivity would be better for higher accelerations. If you only wanted to measure up to 20g rather than 100g, then you'd want more mV/g so that you would have better resolution (read the vibration more accurately).

There are many search options available, which bring up far better resources than I can provide by typing here.
http://www.lmgtfy.com/?q=accelerometer+sensitivity
 

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