| 摘要 |
A dispensing arrangement in a fluid line that isolates a region of fluid in the line from pressure effects in the line outside the region. A housing of measuring fluid surrounds the region so that changes in the measurement fluid pressure cause changes in the pressure of the original fluid in the region. Predetermined volume increments of the measurement fluid are displaced, causing changes in the original fluid pressure in the region which are measured by a pressure transducer. The dispensing arrangement also repetitively dispenses fluid into and out of the region in increments monitored by the pressure transducer.
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