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ECONOMY LIQUID SENSOR <br />DESCRIPTION <br />The TSP -EIS Liquid Sensor is an electro -optic liquid sensor <br />which may be used with all Tank Sentinel® automatic tank <br />gauge consoles equipped with point sensor inputs. It may be <br />installed in the space between the walls of double wall tanks, <br />in sumps, or in other locations where the presence of liquid <br />indicates a leak has occurred. The TSP -EIS is made ofchemically <br />resistant polysulfone plastic to assure compatibility with most <br />liquids and is supplied with 25 feet of oil resistant cable <br />attached. A normally closed output circuit provides supervised <br />operation, ensuring that broken wires and similar failures will <br />not go undetected. <br />THEORY OF OPERATION <br />The secret to the TSP-EIS's reliability is its electro -optic <br />technology. Inside the body of the probe, a small light -emitting <br />diode creates a beam of infrared light. This light travels through <br />the transparent plastic prism to its surface. If the probe is dry, <br />the light is reflected back to the light sensor. When the probe <br />is immersed in liquid, the light travels out of the prism, and no <br />light is reflected back to the light sensor. The light sensor's <br />output signal is used to indicate whether the probe is wet or dry. <br />ORDER PART NUMBER: TSP -EIS <br />2.62 <br />.62 — <br />5/8' HEX <br />Uistributea <br />000-1253 rev. A <br />TANK SENTINEV' <br />APPLICATION <br />The TSP -EIS may be installed in fiberglass or steel double wall <br />tanks as well as in sumps and other locations. To install the <br />sensor in a fiberglass tank, it is typically pulled into the <br />interstitial space using a "fish" string or wire. In steel tanks, the <br />probe is usually lowered directly to the bottom of the interstitial <br />space through a 2 -inch NPT fitting provided for that purpose. <br />Installation kits are available which include a riser cap and <br />other parts required to complete the installation. <br />FIBERGLASS TANK <br />INSTALLATION <br />STEEL TANK <br />INSTALLATION <br />CON] <br />INTELLIGENT CONTROLaINC. <br />P.O. Box 638 • Saco, ME 04072 USA <br />800-833-8328 / 207-283-0156 <br />Fax: 207-283-0158 <br />