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Veeder-Roof Sensor Application Guide Hydrostatic Reservoir Sensor The Hydrostatic Reservoir Sensor accurately detects fluid level change in the reservoir and interstice of a double- wall storage tank. This sensor is available in a dual-point or single-point configuration. The Dual-Point version is ideal for high groundwater areas, and can differentiate between a high level alarm condition and a low level alarm condition. If an inner-wall leak occurs, the brine seeps into the tank triggering a low level alarm, if an outer wall leak occurs, fluid seeps into the interstice triggering a high level alarm.The Single-Point version can be used in low groundwater locations. If an inner-wall leak occurs, the brine seeps into the tank triggering a fuel alarm, or if the outer wall leaks,the brine seeps out of the tank interstice triggering a fuel alarm. Table 15. Hydrostatic Reservoir Sensor Features and Console Compatibility Item Description Form number 794380-301 Single-Point(12 foot[3.7m]cable);794380-303 Dual-Point(12 foot[3.7m]cable) Operating principle Float switch Product activation height' 1.74"(4.4cm)Single-Point;Low 1.2"(3cm),High 13.13"(33.4cm)Dual-Point Reservoir solutions Up to 5090 ethylene glycol in water;up to 5090 propylene glycol in water;salt brine solution of up to 3M9 CaCI Operating temperature -13 to+122°F(-25 to+50°C) Dimensions 6"(15cm)high,2.5"(6.4cm)dia.Single-Point;17.3"(44cm)high,2.5"(6.4cm)dia.Dual-Point Compatible consoles TLS-450/TLS-450PLUS,TLS4/8601 Series,TLS-350 Series,TLS-300 Series Console Interface TLS-300 Series-no input module required Module TLS-350 Series,Interstitial/Liquid Sensor Interface Module,8 sensor input,P/N 329358-001 TLS-450/TLS-450PLUS-Universal Sensor Module(USM),16 sensor input,P/N 332812-001 TLS4/8601 Series-Universal Sensor Input Output Module(USIOM)(AC ver.),12 sensor input,P/N 333238-001;(AC ver.), 6 sensor input,P/N 333238-002;(DC ver.),12 sensor input,P/N 333238-003;(DC ver.),6 sensor input,P/N 333238-004 Maximum number of TLS-300 Series(8) sensors monitored per console TLS-350 Series(48) TLS-450/TLS-450PLUS(32) TLS4/8601 Series(12) Compatible fuels See"Sensor Application Matrix"on page 1. 'For additional third party evaluation data see:http://nwglde.org/evals/veeder_root_q.html Miscellaneous Weatherproof Manhole Cord junction box • Interstitial sensor riser cap and adapter kit, 2" \ grip P/N 312020-928 zr_Lz� • Sensor,fiberglass interstitial sensor installation kit P/N 330020-436eal-off • Installation example (see Fig. 12) Riser pipe cap Dual-pointRigid hydrostaticconduit sensor (to console) Float Reservoir Brine level Double-wall /tank Fig.12 Example Hydrostatic Dual-Point Sensor Installation 16