UNSPSC 41103323: Open channel acoustic flowmeter

Equipment that is used for hydraulic experiment by using the artificial waterway. It is the device used to measure the flow velocity, flow velocity distribution, river bed change, flow rate and others at the open channel with water flowing.

UNSPSC 41103323 Open channel acoustic flowmeter is a Commodity code that encompasses gas flow calibration and measurement equipment used in air and water quality monitoring, laboratory calibration, and environmental compliance operations. State and local governments procure under this code primarily through environmental protection agencies, water utilities, and municipal departments—including air quality monitoring divisions, wastewater treatment facilities, and water resource management authorities. The scope of work reflects actual recent solicitations: gas flow calibrators with NIST-traceable components and EPA-compliant specifications; mass flow terminals serving as primary standards for calibration laboratories; zero air generators supporting air quality monitoring networks; and replacement parts for proprietary air quality monitoring equipment. Equipment typically must maintain traceability to the National Institute of Standards and Technology, comply with EPA verification protocols, interface with existing laboratory infrastructure via standard connections, and include comprehensive warranties and manufacturer documentation.

Recent activity concentrates in Texas and Illinois, driven by state environmental protection and quality assurance operations. The Texas Commission on Environmental Quality (TCEQ) Air Monitoring Division has issued multiple bids under this code, including a June 2026 RFB for gas flow calibrators (Solicitation 5822615780, due July 7, 2026) specifying Mesa Metrology Series equipment with defined flow cell ranges and NIST traceability, and a March 2026 RFB for a mass flow terminal (Solicitation 5822615424, due March 31, 2026) requiring a Fluke Electronics Molbox2-A700K or equivalent. Illinois Environmental Protection Agency posted a sole-source BOA for zero air generators in March 2026 valued at $59,100 (Solicitation 26532EPAAIR53B51461), and a small-purchase procurement for Teledyne air quality monitoring equipment parts in March 2026 valued at $43,780 (Solicitation 26532EPAAIR53B51349). Eastern Municipal Water District (EMWD) in California issued an RFP for meter verification, calibration, and preventative maintenance services in June 2026 (Solicitation RFP3856, due July 15, 2026). Texas bidders may claim preferences under state procurement regulations based on Texas bidder status, service-disabled veteran ownership, or economically depressed area sourcing; Illinois and California solicitations follow their respective state certification and insurance requirements. Delivery typically occurs within 60 calendar days, with testing and inspection completed within 45 days and payment processed 30 days after successful testing.