UNSPSC 41112500: Liquid and gas flow measuring and observing instruments

UNSPSC 41112500 Liquid and gas flow measuring and observing instruments is a Class code under which state and local governments procure calibration equipment, flow monitoring systems, and specialized instruments for environmental compliance, water management, and wastewater operations. Recent solicitations show government buyers acquiring gas flow calibrators with NIST traceability for air quality monitoring, mass flow terminals for secondary equipment calibration, flow meters and related hardware for water distribution systems, and complete flow monitoring and rain gauge networks for collection systems—with emphasis on real-time data capture, remote notification, and EPA protocol compliance. Issuing bodies span environmental protection agencies, municipal water districts, cities, and counties across multiple states, with Texas agencies appearing most frequently in the current activity block.

Texas dominates recent posting activity through the Texas Commission on Environmental Quality, which has solicited gas flow calibrators (RFB 582-26-15780, due July 7, 2026) and a mass flow terminal (RFB 582-26-15424, originally due March 31, 2026) for its calibration laboratory; both opportunities allow Texas bidder preferences under 34 TAC Rule 20.38 and require NIST traceability and EPA compliance. The City of Nashua, New Hampshire issued an IFB (IFB0298-061026, due June 10, 2026) for supply, installation, and maintenance of seventeen flow monitors and three rain gauges in its wastewater collection system with a mandatory pre-bid meeting May 27, 2026. Eastern Municipal Water District in Riverside County, California is seeking meter verification, calibration, certification, and repair services (RFP 3856, due July 15, 2026). Additional activity includes water meters and related hardware procurement by the City of Gloucester, Massachusetts (Bid #26117, due May 26, 2026) and Cla-Val parts supply for Riverside County inventory (RFB 3909, due February 13, 2026). Geographic concentration is heaviest in Texas and California, with secondary activity in New Hampshire and Massachusetts.