SLAC National Accelerator Laboratory is soliciting a quote for one UDI20+ water particle counter capable of detecting particles down to 20nm, with specific technical requirements. The performance location is SLAC in Menlo Park, CA, and the vendor must provide local support. The lead time for the tool must be 60 days or less after order receipt, and source selection will be based on the Lowest Price Technically Acceptable (LPTA) method. The Buy American Act certification applies if the unit price exceeds $15,000, and all subcontractors must be registered in SAM.gov. The resulting order will be a fixed-price purchase with NET-30 payment terms and FOB Destination Prepaid freight.