UNSPSC 41112502: Rheometers

UNSPSC 41112502 Rheometers is a Commodity code under which state and local governments procure laboratory and field measurement equipment for environmental monitoring, calibration, and verification operations. The recent solicitations show that purchasing under this code centers on gas flow calibrators, mass flow terminals, and related precision measurement instruments used to calibrate secondary monitoring equipment and verify air quality and water measurement systems. Issuing bodies include state environmental and natural resource agencies (Texas Commission on Environmental Quality, Illinois Environmental Protection Agency), municipal utilities (Eastern Municipal Water District), and county governments (Riverside County). The work spans equipment procurement with strict NIST traceability and EPA protocol compliance, preventative maintenance and repair services, spare parts supply for existing installations, and sole-source or single-source acquisitions of manufacturer-specific replacement components.

Activity is concentrated in Texas and Illinois, with California representation as well. Recent opportunities include the Texas Commission on Environmental Quality's RFB for Mesa Metrology gas flow calibrators and cells (due July 7, 2026), a mass flow terminal (Molbox2-A700K or equivalent, due March 31, 2026), the Illinois Environmental Protection Agency's Basic Ordering Agreement for Sabio zero air generators valued at $59,100 (posted March 12, 2026), and Illinois's sole-source procurement of Teledyne air quality monitoring equipment replacement parts estimated at $43,780 (posted March 2, 2026). Eastern Municipal Water District issued RFP 3856 for meter verification, calibration, certification, preventative maintenance, and repair services (due July 15, 2026). Riverside County solicited Cla-Val parts for warehouse inventory through RFB 3909 (due February 13, 2026). Texas state procurements frequently allow bidders to claim preferences under state rules based on Texas vendor status, service-disabled veteran ownership, or economically depressed area sourcing, though no mandatory set-asides appear in the recent record. Delivery timelines typically run 14 to 60 calendar days, with testing and inspection conducted within 30 to 45 days of receipt.