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Leak Sensors 1W <br />tions <br />Application m r f tr,rr f. <br />i <br />5 <br />• • • • • • • • • w Y"` �` .y `b fix`. <br />Annular Access <br />Double Wall Tanks <br />Flexible cables bend around the annu- <br />lar gap between tank walls allowing the <br />liquid sensor to be positioned at the <br />lowest point of the FRP tank. If desired, <br />a vapor sensor can be mounted'near <br />the manhole at the top of the void. A <br />junction box placed in the manhole <br />connects the cable to the monitoring <br />panel via underground conduit. <br />Single Wall Tank <br />Monitoring Wells <br />Vapor sensors can be placed in wet or <br />dry monitoring wells located at the end <br />or center of single wall tanks. Combina- <br />tion liquid/vapor sensors are recom- <br />mended for dry well installations. In <br />both situations, either a vertical or slant <br />access can be utilized with the appro- <br />priate casing to contain the cable. Con- <br />nections are made at a junction box <br />located in the manhole. <br />Well Cap Vapor Sensor <br />Applications <br />The Well Cap Vapor Sensor is ideally <br />suited for single wall tank monitoring <br />well applications. This sensor simply <br />replaces the 4" threaded cap at the <br />top of the monitoring well. As with other <br />applications, the sensor is connected <br />to the remote monitoring panel via <br />underground conduit. <br />Copyright 1985 Emco Wheaton Inc. <br />All rights reserved. <br />I <br />T <br />_ <br />w <br />n <br />T <br />_ <br />w <br />n <br />