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California Edition: September 1997 <br />Tidel Engineering, Inc. <br />EMS -3500 <br />with Containment Sump Probes Part 301-0642 <br />Detector: <br />Output type: <br />qualitative <br />Sampling frequency: <br />continuous <br />' Operating principle: <br />magnetic switch1float and hydrocarbon sensitive polymer <br />Test Results: <br />unleaded <br />gasoline <br />water <br />lout <br />hich <br />Accuracy N <br />100 <br />100 <br />100 <br />Response time (min) <br />6.39 <br />4.76 <br />4.12'"' <br />Recovery time (min) ,'f <br />>60 <br /><1 <br /><1 <br />Product activation height (cm) 227 <br />4.31 <br />19.22 <br />Lower detection limit (cm) <br />2.32 <br />4.31 <br />N/AX" <br />At a flow rate of 0.89 gal/hr in test chamber of diameter 12.6 cm. <br />" Larger test chamber and flow rate of 1.51 gal/hr. <br />*** See glossary. <br />Specificity Results: <br />Activated at 2.27 cm height: diesel fuel, synthetic fuel, heating oil #2. <br />Comments: <br />Test procedures used were Camegie Mellon Research Institute's 'Test Procedures for Third Party <br />Evaluation. of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": <br />Final. Report - November 11, 1991. <br />Probe was tested to determine its capability of defecting hydrocarbons floating on water. <br />A Lower detection limit thickness of 0.04 cm was declared, on average, in 16 minutes, 41 seconds with <br />recovery time averaging 12 minutes, 55 seconds. <br />Detector is reusable. <br />Tidel Engineering, Inc. <br />i 2615 E. Belt Line Rd. <br />Carrollton, TX 75006 <br />Tel: (800) 678-7577 <br />Evaluator. Carnegie Mellon Research Institute <br />Tel: (412) 268-3495 <br />Date of Evaluation: 02/17/93 <br />239 <br />Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the performance of <br />the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and regulations. <br />