D 2 Inc.,* Bourne, Massachusetts, is awarded a $20,167,277 firm-fixed-price, indefinite-delivery/indefinite-quantity contract for the production and delivery of up to a maximum quantity of 841 portable particle counters as well as non-recurring engineering, logistics and test support. The particle counter measures the level of particulate contamination contained in the fluid (petroleum, synthetic-based fluids, glycols, and phosphate ester fluids) samples taken from aircraft or ground support equipment. The results are used to determine if the fluid is clean enough to be used in the appropriate system. Work will be performed in Bourne, Massachusetts (75%); Lakehurst, New Jersey (18.75%); and Patuxent River, Maryland (6.25%), and is expected to be completed in June 2029. No funds will be obligated at the time of award; funds will be obligated on individual orders as they are issued. This contract was competitively procured via an electronic request for proposal; three offer was received. Naval Air Warfare Center Aircraft Division, Lakehurst, New Jersey, is the contracting activity (N6833524D0001).