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► Positive alarm indication of any liquid in double-wall fiberglass tanks. ► System indicators pinpoint alarm location. ► Simple to install. ► Two -wire connection to system monitor. ► Fast action helps prevent serious safety and environmental problems. The Veeder-Root Interstitial Sensor for use in fiber- glass tanks detects the presence of liquid in the an- nulus of a double-wall fiberglass tank. Liquid in the annulus could mean a dangerous leak. When liquid is detected, the sensor sends an alarm signal to a TLS -350, ILS -350, TLS-300i,TLS-2501 Series or ILS - 250 monitor. The monitor's visual and audible built- in alarm indicators immediately tell you where the problem is, so you can quickly take action to help prevent serious safety and environmental problems. The TLS -350, ILS -350, TLS -300i, TLS -300i Series and ILS -250 Systems feature internal alarm relays that can also trigger on-site alarms for even greater warning capability. When connected to a TLS -350, TLS -300i or TLS -250i system, the sensor alarm triggers a report showing the time and the location of the alarm condition. This information is stored in the TLS -350, TLS -300i or TLS-250i's alarm history and can be retrieved through the monitor's integral printer or remotely through its data communications interface. The Veeder-Root Interstitial Sensor for fiberglass tanks can be used in the annulus of fiberglass tank with a sensor riser pipe of 4". Only two wires are re- quired to connect the sensor to a TLS or ILS system. Detection Capabilities ► The presence of any liquid in the tank's interstitial space triggers a Fuel Alarm. Operating Capabilities ► Operating Temperature Range: -200C to +70°C (Hydrocarbons); 0'C to 700C (non-freezing Water). ► Storage Temperature Range: -40'C to +750C. ► Dimensions: 2.13" long, 1.27" wide, a58" high Standard Components CITY DESCRIPTION 1 Interstitial Fiberglass Tank Sensor 2 Watertight Cord Grips