| 摘要 |
An apparatus 100 for measuring quality of a solution includes a configuration of sensors 180, 190, 200 for measuring mechanical and electrical properties within a volume of the solution, the measurements being mutually differently influenced by components present in the solution. A data processing arrangement 230 is operable to process the measurements of mechanical and electrical properties for generating output data indicative of a quality of the solution. At least a portion of the apparatus below flange 110 is inserted into the solution container. The apparatus 100 may be applied to measuring quality of a urea solution for use in vehicle and combustion engines, and may include a float 160 to sense fluid level and a heater loop 140. Sensors may include temperature 180, acoustic or piezoelectric 190 for measuring density, and electrical conductivity 200 sensors.
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