Commander, Naval Sea Systems Command, SEA 024H, 2531 Jefferson Davis Hwy, Arlington, VA 22242-5160

66 -- SOURCES SOUGHT FOR COMMERCIALLY AVAILABLE CONTINUOUS READING TLI SOL 97-4069 POC W. Nedbal, 602-0202 SOURCES SOUGHT FOR COMMERCIALLY AVAILABLE CONTINUOUS READING TASK K LEVEL INDICATORS (TLIs) -- As part of the Engineering for Reduced Maintenance (ERM) Program, sources are sought by the Naval Sea Systems Command for commercially available continuous reading TLIs that may be adapted to U.S. Navy shipboard applications. Representative systems may be evaluated to assist in updating the U.S. Navy TLI system requirements, currently documented in MIL-L-23886. Due to the costs associated with entering a tank for maintenance, the U.S. Navy is looking for TLI (s) which eliminate or minimize tank entry requirements (removal of any in-tank components for maintenance is desired to be achieved without having to gas free, weld or enter tank). Shipboard tanks are primarily non-symmetrical, with varying degrees of internal structure and accessibility, and may range in height from a few feet to over 60 feet. The tanks may be pressurized or vented and may contain a single fluid (eg. fuel, oil, water) or multiplefluids (e.g. seawater compensated fuel tanks). The sensing device must provide accurate continuous level measurement and compensate for variations in fluid properties such as specific gravity, viscosity, and conductivity. The TLI must operate with surging and turbulence of fluids due to rapid filling and draining of tanks, sloshing of fluids in tanks caused by ships rolling and pitching and contaminant buildup (calcareous, sludge, marine and biological). Additional information is also sought, if known, concerning the TLI system's resistance to harsh environmental conditions such as shock, vibrations, electromagnetic interference, high humidity, temperature, salt spray and corrosion effects. The TLI system may be required to have analog or digital indicator panel displays, adjustable alarm setpoints with varible time delays to minimize spurious alarms due to ships motion and an RS-232 output capable of interfacing with the ships fiber optic network. Sources are also sought for commercial Level Sensing Switches or continuous Tank Level Indicators (TLIs) for monitoring and control of sewage collection, holding, and transfer systems (i.e. pump control and high and low level alarms). The switches or TLIs shall be able to be replaced and maintained from outside the tank. It is desirable to have a minimum of components mounted inside the tank. These switches shall be able to function for a minimum of 10 years in a shipboard sewage collection tank. The switches or TLIs will be subject to a corrosive, seawater sewage environment, frequent activation and deactivation, the rolling and pitching of tank contents, and sewage and plumbing drain waste sludge buildup. These tanks range from 200 to 50,000 gallons in size, of symmetrical and asymmetrical shapes with varying degrees of structure such as stiffeners, internal piping, and swash plates. The tanks are vented to atmosphere, and are epoxy coated. The switches or TLIs will interface with pump motor controllers and local and remote alarm panels. The pump motor controllers utilize conventional electrical relays and programmable logic controllers. All interested firms should submit system and component data sheets, brochures, pricing information, lists of existing shipboard or land based installations, users of the system, test reports, certifications etc., that clearly address these stated requirements. This announcement is intended to identify potential sources of the subject equipment. Neither this announcement nor any data submitted to the Point of Contact shall be construed as a commitment of any kind. The Government will not pay for any material provided in response to this synopsis nor return the data provided. Responses are required in thirty (30) days after publication of this notice. The technical point of of contact for this notice is Milt Spivack, NAVSEA Code 03Z73, telephone (703) 602-6137, ext 342. Response should be sent to his attention at Naval Sea Systems Command, 2531 Jefferson Davis Highway, Arlington VA 22242-5160. The technical point of contact for sewage collection Tank Level Sensing Switches or TLIs is Drew Demboski, NAVSEA Code 03L13, telephone (703) 602-0351, ext 106. Reference Synopsis No. 97-4069 (0010)

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