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Reading Pulse signal from a flow meter


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I need to monitor the singal from a liquid flow meter in a pc application. The documentation says that the output is pulse in a "digital open collector signal." It also specifies that a 820 ohm pull-up resister must be used.  Distance will be about 20 feet. For this particular flow meter 215 pulses = 1 gallon of fluid dispensed.

I am looking for a converter, logger, or other device that will convert this information into something a pc can understand (like rs232 serial) . Can someone please point me in the right direction?

Thanks

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