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Veeder-Root Sensor Application Guide <br />Interstitial Sensors for Double -Wall Fiberglass Tanks <br />The non -discriminating interstitial sensor for fiberglass tanks detects the presence of liquid in the interstitial space <br />of the tank. An open sensor triggers a Sensor Out alarm. <br />Table 9. Interstitial Sensor for Double -Wall Fiberglass Tanks Features and Console Compatibility <br />Item <br />Description <br />Form number <br />794380-409 (includes 25 ft [7.6m] cable; for 4 -12 ft [1.2 to 3.6m] I.D. fiberglass tanks) <br />Operating principle <br />Float switch <br />Product activation height' <br />0.72 inches (1.84 cm) <br />Operating temperature <br />-4 to +140°F (-20 to +60°C) <br />Dimensions <br />2.2" (5.6cm) length, 1.3"(3.3cm) width, 0.6" (1.5cm) thick <br />Compatible consoles <br />TLS-450/TLS-450PLUS, TLS4/8601 Series, TLS -350 Series, TLS -300 Series <br />Console Interface <br />Module <br />TLS -300 Series - No input module required <br />TLS -350 Series, Interstitial/Liquid Sensor Interface Module, 8 sensor input, P/N 329358-001 <br />TLS-450/TLS-450PLUS - Universal Sensor Module (USM), 16 sensor input, P/N 332812-001 <br />TLS4/8601 Series - Universal Sensor Input Output Module (USIOM) (AC ver.), 12 sensor input, P/N 333238-001; (AC ver.), <br />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 <br />Maximum number of <br />sensors monitored per <br />console <br />TLS -300 Series (8) <br />TLS -350 Series (48) <br />TLS-450/TLS-450PLUS(32) <br />TLS4/8601 Series (12) <br />Compatible fuels <br />10096 Gasoline and blends with up to 15% Ethanol; Diesel; Bio -Diesel; Kerosene; Jet fuel; Aviation Gas; Waste Oil; Motor <br />Oil <br />'For additional third party evaluation data see: http://nwglde.org/evals/veeder_root_m.html <br />Miscellaneous <br />• Installation example (see Fig. 6) <br />0 <br />