Department of the Interior, U.S. Geological Survey, 345 Middlefield Road,Mail Stop 285, Menlo Park, CA 94025-3591

70 -- WATER-LEVEL SENSOR AND DATA LOGGER REQUIREMENTS. SOL 00-4704-0128 DUE 060500 POC trinidad f. biando (650) 329-4176 E-MAIL: tbiando@wr.usgs.gov, tbiando@wr.usgs.gov. THE U.S.Geological survey intends to procure from In-Situ Inc.,the only source for minitroll's, which is the only water-level sensor and datalogger device that is known to meet all of the requirements listed below: -submersible sensor vented to atmosphere. -sensor and data-logger must fit inside a 1 and 3/8 inch inside diameter pipe. -sensors must be sufficiently accurate to resolve 0.02 ft of water-level variation. -sensor must be capable of being reconfigured for different depts to water. -data loggers must be capable of linear, logarithmic, and event based sampling. Posted 05/15/00 (W-SN454843). (0136)

Loren Data Corp. http://www.ld.com (SYN# 0268 20000517\70-0003.SOL)