| 摘要 |
A transmitter for providing inventory or inventory transfer information on industrial sites is described, for measurement of mass (M), weight (W), volume (V), level (L) and/or density (rho) of a product ( 1 ) in a vessel ( 3 ) comprising: a level sensor ( 5 ), comprising: a conductive probe ( 9 ) extending into the vessel ( 3 ), means ( 11, 13 ) for generating and sending short electromagnetic pulses (S) down the probe, means ( 15 ) for reception of echoes (E) of the pulses (S) reflected at a surface of the product ( 1 ), means ( 17 ) for determining a time of flight (t) needed for a pulse (S) to travel down the probe ( 9 ) and its echo (E) to return, a pressure sensor ( 7 ), mounted on the probe ( 9 ), and a signal processing unit ( 45 ) for determining mass (M), weight (W), volume (V), level (L) and/or density (rho) based on measurement signals supplied by the level sensor ( 5 ) and the pressure sensor ( 7 ).
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