| 摘要 |
An automatic draw-off grease interceptor (10), for removing grease from an effluent stream containing grease and water, comprises a separation tank (12) defining a separation chamber (40). An effluent inlet (24) is connected with the separation tank (12) for permitting flow of the effluent stream into the separation chamber (40) to form a body of effluent in the separation chamber, the body of effluent having an upper surface. The interceptor (10) also includes a pump (70) for pumping grease from the body of effluent in the separation chamber (40). The interceptor (70) also comprises a sensor operative for sensing the presence of a thickened layer of grease in the body of effluent at a predetermined level (120). The sensor comprises an insulated conductive probe (90) extendi ng generally vertically in the separation tank (12) from a location above the upper surface of the body of effluent to a location below the predetermined level (120). The interceptor (10) also comprises means for continuously measuring th e capacitance between the probe (90) and the separation tank (12) as the thickness of the layer of grease varies.
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