RPM Measurement

 
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BRumfelt
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Joined: 09 Jan 2008
Posts: 1
Location: USA
PostPosted: Wed Jan 09, 2008 1:12 pm    Post subject: RPM Measurement Reply with quote
I need to record the rpm of two shafts over a 24 hour period. What type of sensor would I need to use with an ADC-11 data logger to perform this function?
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picojohn
Site Admin
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Joined: 11 Jun 2007
Posts: 371

PostPosted: Wed Jan 09, 2008 2:41 pm    Post subject: Reply with quote
Hello BRumfelt,

You would need a sensor producing a d.c. voltage which varies between 0 to 2.5V proportional to rpm.

If the sensor voltage output range is greater than 2.5V, then you could use a simple resistive divider to bring it into range of the ADC-11.

Regards
John
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