UNSPSC 25173122: Doppler Direction Finder (DF)

Doppler radio direction finding, or Doppler DF for short, is a radio direction finding method that generates accurate bearing information with a minimum of electronics. It is best suited to VHF and UHF frequencies, and takes only a short time to indicate a direction. This makes it suitable for measuring the location of the vast majority of commercial, amateur and automated broadcasts, and Doppler DF is one of the most widely used direction finding techniques. Other direction finding techniques are generally used only for fleeting signals, or longer or shorter wavelengths.

UNSPSC 25173122 Doppler Direction Finder (DF), a Commodity code, shows minimal relevant recent activity in state and local procurement. The single opportunity identified in the source—the City of Tucson's RFP #240078 for comprehensive Maintenance, Repair, and Operations (MRO) Supplies, Parts, Equipment, and Materials—does not appear to procure direction-finding equipment; instead, it establishes a master agreement for diverse MRO products across lighting, safety, cleaning, electrical, and plumbing categories delivered to multiple Tucson metropolitan locations, with proposals due March 28, 2024. The remaining posted opportunities in the source (chemical-resistant water-system parts, trade labor, aquatic facility operations, space-management consulting, SCADA instrumentation, pressure gauges, electrical components, and laboratory services) address water infrastructure, facilities management, and utility operations but contain no specific demand for Doppler direction-finding or related RF detection equipment.

State and local procurement activity under this code does not materialize in the recent opportunities provided. Absent clear, grounded evidence of direction-finder solicitations among the source records, the code should be treated as inactive or misapplied in current state and local procurement. Business development professionals should verify whether state and local buyers actually specify DF equipment independently or whether demand exists only as a subordinate component within broader instrumentation or communications system upgrades not yet visible in available notice databases.