Measurement for a permanent meter that will be used to fill a rail car?

Which do you think would be the best flow measurement device for this application, and why? (“Best will include cost considerations and the accuracy requirements).

a)A permanent meter that will be used to fill a rail car with liquid methanol (constant flow when the rail car is being filled, no flow when there is no rail car). The meter will be used to determine the quantity of methanol purchased from the facility. The methanol is pumped with a constant speed electric motor driven pump.

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2 Responses to “Measurement for a permanent meter that will be used to fill a rail car?”

  1. introverted says:
    September 4th, 2011 at 1:47 am |

    Time would be the best metering.
    Example
    8 gallon tank, pump flow rate 2 gallons per second, govern a timer controlled solenoid to 4 seconds.

  2. oeman50 says:
    September 4th, 2011 at 2:37 am |

    Turbine meters are most often used in flow totalizing for commercial applications. You can buy them with different accuracies, the more accurate, the more expensive. The accuracy of the meter is often determined by contractual agreement between the seller and the buyer, or just your internal company standards. You may need to recalibrate it (or have the manufacturer calibrate it) for methanol at the concentration(s) you are using.

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