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Monit Effective Hydrostatic Monitoring Monitoring the Tank with a Systems for Xerxes Double Wall Tank Reservoir Probe Xerxes double wall tanks may be monitored with a variety of The accurate monitoring of the primary and seco idary tank systems. Each monitoring mode-depending on the eco- walls is accomplished through the use of an elecl�onic sensor nomics of the installation-is designed to detect a leak in and the tank-mounted hydrostatic reservoir,# either the primary or secondary tank as well as the attached collar riser. Should an installation require maximum round-the-clock mon- itoring of tank interstitials, attached collar risers, and/or tank level conditions, a variety of options are available in both our LU and LPD series consoles which are pre-configured to accept from I to 9 sensors, RTj1R1OJR P1 .SENSOR W1 H E R f P111 T"" ft'O'R P'P" OR OL PANEL (:q: LLELL I Typical three-tank installation with control panel individually monitoring the With the interstitial space and reservoir factory-filled with attached collar risers and tanks. liquid to a predetermined level, a hydrostatic pressure is applied to the inner and outer tank walls. If a leak should ever occur in the inner tank, the liquid level in Controller/Monitor the reservoir will drop as monitoring fluid drains into the pri- mary tank. Should a leak develop in the outer wall, the moni- toring fluid will drain into the excavation and again lower the The control unit provides LED's (indicator lights) to show the level of monitoring fluid. individual operating condition of each sensor in the installa- tion, The control unit, also equipped with an audible alarm, Should a leak occur in the outer wall during high-groundwa- may be located up to 2000'from the installation. ter conditions, the level of the monitoring fluid will rise as out- side water seeps into the interstitial space. In any of these situ- ations, a change in the liquid level beyond the acceptable lim- Control Unit (Three-Channel Panel Shown) its will activate the alarm. The controller is also equipped with a test switch to prove the system functional. The control panel is weather and corrosion-resistant, Power(green) -The system is powered. nn AJarm(red) -The alarm light, plus an audible warning, will indicate either a high level condition for reservoir sensors or a Ll 0 fuel condition for PD-Series Sensors. OPD1 0 ,Narm(yellow) -The alarm light, plus an audible warning, will indicate either a low level condition for reservoir sensors or a *PD2 0 water condition for PD-Series Sensors Horn (Units up to nine channels The electronic monitoring system is listed by Underwriters Laboratories.Inc. TEST 0 HORN OFF also available.) The monitor sensors for the reservoir and riser are intrinsically safe for use in /I- Class 1,Group 0,hazardous locations,as defined by the National Electrical Code U0 14