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Veeder-Root Sensor Application Guide CEIVED <br />Interstitial Sensors for Steel Tanks <br />31 2018 <br />The Interstitial Sensor for steel tanks detects the presence of liquid between the double walls of the tank. An open <br />sensor triggers a Sensor Out alarm. ENVIRONMENTAL <br />HEALTH nPPART�.nrNT <br />Table 11. Interstitial Sensor for Steel Tanks Features and Console Compatibility <br />Item <br />Description <br />Form number <br />794380-420 (16 foot [4.9m] cable); 794380-460 (30 foot [9.1m] cable) <br />Operating principle <br />Float switch <br />Product activation height' <br />1.59 inches (4.05 cm) <br />Operating temperature <br />-4 to +140°F (-20 to +60°C) <br />Dimensions <br />2.5" (6.4cm) high, 1.5" (3.8cm) diameter <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-450 PLUS - 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 />See "Sensor Application Matrix" on page 1. <br />'For additional third party evaluation data see: http://nwglde.org/evals/veeder_root_m.html <br />Miscellaneous <br />• Riser cap and adapter kit (2") - <br />P/N 312020-928 <br />• Installation example (see Fig. 7) <br />r ,i N v ' Weatherproof <br />o a. • o junction box <br />O S <br />Seal -off <br />Manhole <br />Rigid conduit <br />(to Console) <br />1/2" NPT <br />cord grips <br />Appropriate reducer r----- ---- -- --- <br />with 1/2" NPT <br />opening for cable ; <br />cord grip <br />i <br />I <br />Leader cable f � <br />0 <br />Riser <br />I i <br />i <br />I i <br />Tank <br />I � <br />i <br />i <br />Sensor must rest <br />on bottom of ; <br />interstitial riser <br />Fig. 7 Example Interstitial Sensor Installation - Steel Tank <br />12 <br />