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LG .l 13 Vendor/Template Page 1 of 3 <br />0 01 <br />Issue Date: April 18, 1997 <br />Revision Date: December 17, 2003 <br />r <br />Models 404 and 406 Liquid Level Sensors, Models EOS100, 510 and 516 Discriminating Sensors <br />with Models 500 and 500C Controllers, Model 522 Remote Monitoring System, <br />and Model 522T Monitoring System <br />► _ l <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 (Model <br />516) <br />Test Results: <br />s `r s s ►' •KTr 1Kj Or 111#2#1s' 11 <br />Model 510: Currently the SWRCB UST Program staff discourages the use of polymer strip discriminating sensors at <br />new installations in California. This is due to concerns about the impact that repeated/prolonged exposure to <br />hydrocarbons may have on the sensor's ability to alarm and recover from alarm reliably. Since current evaluation <br />protocols do not address this issue, no new polymer strip sensors should be installed until new evaluation protocols <br />are in place. <br />Model 516: This sensor can only respond to liquid directly in contact with the detection element, and is unable <br />to detect a product release floating on an existing pool of water whose height exceeds the level of the <br />detection element. <br />Model 404 Liquid Level Sensor <br />unleaded <br />diesel <br />water <br />asoline <br />Detection time (sec) <br /><1 <br /><1 <br /><1 <br />Fall time <br />manual reset <br />manual reset <br />manual reset <br />Precision (in) <br />0.0124 <br />0.0167 <br />0.0067 <br />Lower detection limit (in) <br />0.89 <br />0.72 <br />0.68 <br />Model 406 Liquid Level Sensor <br />Detection time (sec) <br /><1 <br /><1 <br /><1 <br />Fall time <br />manual reset <br />manual reset <br />manual reset <br />Precision - standard deviation (in) <br />0.003474 <br />0.001923 <br />0.005329 <br />Lower detection limit (in) <br />0.357 <br />0.321 <br />0.369 <br />Model EOS100 Discriminating <br />Sensor (5 sensing levels) <br />Detection time (sec) <br /><1 <br /><1 <br /><1 <br />Fall time <br />manual reset <br />manual reset <br />automatic reset when <br />water level drops <br />