Veeder-Root Sensor Application Guide 12 Interstitial Sensors for Steel Tanks The Interstitial Sensor for steel tanks detects the presence of liquid between the double walls of the tank. Sensor Detection Capabilities - Alarm Conditions • The presence of any liquid at a nominal height of 1 inch in the tank’s interstitial space triggers a Fuel Alarm. • An open sensor triggers a Sensor Out alarm. Operating Capabilities • Operating temperature range: 0 to +70°C (for water), -20 to 70°C (for hydrocarbons). • Storage temperature range: -40 to +70°C. • Sensor dimensions: 2.5” high, 1.5” diameter. Sensor Interface Module • TLS-350 Series Consoles (except TLS-350J) - Interstitial/Liquid Sensor interface module (P/N 329358-001) accepts up to 8 sensors (a maximum of 64 sensors could be monitored by the console). • TLS-350J Console - 3 sensors max. • TLS-300i, PC-300i, TLS-300C, TLS-300J, PC-300C Consoles (no interface module required) - 8 sensors max. • ILS-350 Console - A Two-Wire module (P/N 329675-001) accepts up to 4 sensors (a maximum of 16 sensors could be monitored by the console). • TLS-450 - USM (P/N 332812-001) accepts up to 16 sensors Console Software Compatibility • TLS-350 series/TLS-300 (Version 1 or later) • ILS-350 (All) • TLS-450 (All) Compatible Fuels • Unleaded gasoline • Unleaded with up to 5% methanol, 15% ethanol, or 15% MTBE • Leaded gasoline • Diesel • Kerosene • Jet fuel • Aviation gasoline Sensor/Cable Length Configurations • Interstitial Sensor with 16-foot cable - Form Number 794390-420 • Interstitial Sensor with 30-foot cable - Form Number 794390-460 Accessories Riser cap and adaptor kit (2”) - P/N 312020-928 Related Sales Literature Visit our website at www.veeder.com for more information on Veeder-Root products and services. 2'' dia. riser Cord grip Weatherproof junction box with 1/2-inch N.P.T. threads (16 Cubic inch volume minimum) 14'' min. dia. manhole Steel tank sensors\intsenap.eps 1/2'' rigid conduit (to Console) Sensor Leader cable 1/2" to 2" Reducer Sensor Switch must rest on bottom of tank Seal-off Fig. 8 Typical Interstitial Sensor Installation - Steel UST
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