UNSPSC 41112500: Liquid and gas flow measuring and observing instruments

UNSPSC 41112500 Liquid and gas flow measuring and observing instruments is a Class code encompassing pressure vessels, flow meters, calibrators, and associated instrumentation that state and local governments procure for water treatment, wastewater monitoring, environmental compliance, and facility operations. Recent solicitations show municipalities and state agencies buying PFAS treatment pressure vessel systems with integrated flow measurement capability, portable and fixed flow monitoring equipment for sewer and stormwater collection systems, atmospheric hazard-detection instruments with gas-sensing capability at water and wastewater facilities, specialty gas refill and microbulk tank systems for laboratory operations, and meter calibration and verification services. Issuing bodies span city water departments, county environmental and waste management authorities, state environmental quality commissions, municipal wastewater divisions, and independent water districts. Cities of Nashua and Phoenix, the Town of Prescott Valley, Collier County, and the Texas Commission on Environmental Quality appear as repeat or recent solicitors under this family.

Geographic activity concentrates in Arizona, Florida, New Hampshire, Texas, California, and Wisconsin, with additional municipal procurement in Massachusetts and New York. Representative recent opportunities include the Town of Prescott Valley, Arizona issuing an IFB (UT261011, due November 17, 2026) for a 250-gallon-per-minute PFAS removal pressure vessel system with ASME certification and field commissioning; the City of Nashua, New Hampshire issuing an IFB (IFB0298100826, closed October 8, 2026) for five portable sewer flow monitors with 24-month web-based data management and support; the City of Phoenix Water Services Department issuing an IFB (IFB-27-0435, due September 4, 2026) for atmospheric monitoring instruments detecting hydrogen sulfide, methane, chlorine, and other hazardous gases at lift stations and confined spaces; Collier County, Florida issuing a single-source notice (PUR17875, closed October 1, 2026) for Siemens process instrumentation including flow meters and level sensors integrated with county SCADA systems; and the City of Tampa issuing a single-source intent (26X01679, closed August 26, 2026) for Emerson-Flexim clamp-on flow measuring devices at $30,000 annual cost. The Texas Commission on Environmental Quality has solicited gas flow calibrators (RFB 582-26-15780, July 2026) and mass flow terminal equipment (RFB 582-26-15424, March 2026) for laboratory calibration and air monitoring networks.