The US Department of Agriculture Agricultural Research Service in Riverside,  Ca. has a requirement for a ZetaPALs instrument to accurately measure and  interprets colloid zeta potentials under environmentally relevant conditions,  the information is needed to help determine the fate of microorganisms and  other colloid-associated contaminates in the environment. ZetaPals colloid  zeta potential analyzer in aqueous and non-aqueous samples Most colloidal  samples suspended in any transparent liquid, size material dependent, for  electrophoresis 0.005 to 30 microns; volume: 1.7ml, optional 0.150 ml for  particle sizing only, ph range 1 to 13, conductivity range 0 to 20 s/m,  mobility range: 10-11 to 10-7 n2/V.s, Temperature rang 6oC to 75 oC +/- 0.1  oC, measurement duration: 10 to 250 s, typically 30 s, Laser 30 mW 50mW  available option, field strength 0 to 60 KV/m either automatic or by manual  selection, cells disposable plastic or glass or quartz, Internal computer  monitor & printer with PalSW software. The USDA intends on negotiating with  the only known source Brookhaven Instruments Corp, Holtsville, NY. A RFQ is  not available interested firms may present proposal to the attention of Fred  Gifford as listed in this notice. See numbered note 22