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Sensor _� 111 <br />*Application <br />recommendations <br />• • • • • . • • • ate} J ¢ ,.'Se w. a 3 -, <br />i <br />Annular Access <br />Double Wali 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 />C 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 />'i <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 />s � 4 � .x <br />7x � �' \ 1 Z �S. 4 • � Yrt� <br />7 <br />K <br />yvfc� r <br />