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®State Water Resources Control Board Page 1 of 4 <br /> Home ..>> Water Issues >> Programs ­>> Ust >> Leak Prevention ->% Lg113 >>Vendors <br /> UST Program - LG 113 <br /> ......... ............ ............. ..... . ...:..................... _.._ .......... .. . . ....., _.. <br /> Issue®ate:aisril 18,1997 <br /> Revision®ate:June 13,2007 <br /> Bureau Electronics, Inc. <br /> Models 404 and 406 Liquid Level Sensors, Model DFR-1 Liquid Level Switch, Models EOS100, 510 and 51 <br /> Discriminating Sensors with Models 500 and 500C Controllers, Model 522 Remote Monitoring System, <br /> Model 522T Monitoring System, and ES11te Monitoring System <br /> INTERSTITIAL DETECTOR(LIQUID-PHASE) <br /> Detector: <br /> Output type: qualitative, discriminating <br /> Sampling frequency: continuous <br /> Operating principle: float switch (Model 404), refractive index of liquids(Model 406, Model EOS100), <br /> polymer strip, hydrocarbon-only(Model 510), optical sensor and conductivity <br /> (Model 516) <br /> *California requires annual certification of aII leak detectioni certification <br /> discriminating sensors should include cti I testing of both waterc et i n <br /> capabilities. <br /> Model 1 : Currently the SWRC13 UST Program staff discourages the use of polymer strip discriminating <br /> sensors at new installations in California. This is due to concerns about the impact that <br /> repeated/ prolongedrepeated/prolonged exposure to hydrocarbons may have on the sensor's ability to alarm and recover <br /> from alarm reliably. Since current evaluation protocols do not address this issue, no new polymer strip <br /> sensors should be installed until new evaluation protocols are in place. <br /> Model 516. This sensor can only respond to liquid ire l in contact withion element, <br /> and is unable to detect a product release i n an existingi of water whose height <br /> exceeds the level of the detection element. <br /> Model 404 Liquid Level unleaded diesel water brine <br /> Sensor 22EEIine <br /> Detection time sec <1 <1 <1 <br /> Fall time manual reset manual manual reset <br /> reset <br /> Precision in 0.0124 0.0167 0.0067 <br /> Lower detection limit in 0.89 0.72 0.68 <br /> Model 406 Liquid Level <br /> Sensor <br /> http://www.waterboards.ca.gov/water issues/programs/ust/leak—Prevention/1gl13/vendors/b... 6/4/2009 <br />