UNSPSC 32151500: Control indicating and signaling devices

UNSPSC 32151500 Control indicating and signaling devices is a Class code spanning industrial control components and systems that state and local governments procure to modernize water treatment, energy, and utility infrastructure. Recent solicitations show state and local buyers are acquiring programmable logic controllers (PLCs), supervisory control and data acquisition (SCADA) systems, valve positioners, continuous emissions monitoring equipment, and related integration services—not generic signaling hardware. The City of Austin Purchasing Office has solicited digital valve positioners and CEMS NOx/O2 monitoring units via IFQ in recent weeks, while West Basin Municipal Water District and the City of Atlanta Department of Watershed Management have issued RFPs for large-scale PLC and SCADA system replacements at water treatment plants. School districts, cities, and special-purpose water districts are the primary issuing bodies under this code, typically bundling equipment procurement with professional engineering and integration services to replace obsolete industrial control systems in operational facilities.

Recent activity concentrates in Texas, California, and Georgia. West Basin Municipal Water District is seeking proposals for Torrance Refinery Water Recycling Plant Programmable Logic Controller Replacements (RFPDS0149, due November 5, 2026), involving replacement of three Modicon controllers with M580 processors, PLC programming, HMI development, and Factory and Site Acceptance Testing. The City of Atlanta issued two pre-advertisement notices for SCADA improvements at Hemphill and Chattahoochee water treatment plants (PE66062NONST2026000000374 and PE66062NONST2026000000376, both posted May 8, 2026, responses due May 29, 2026), requiring integration of AVEVA Wonderware HMI systems, ControlLogix controllers, and network upgrades across 360-day timelines. The City of Austin Purchasing Office posted IFQ1100AGM1029 for a digital valve positioner (due October 20, 2026, prioritizing SBEs and M/WBEs), and the State of California Department of General Services issued an RFQ for Building Automation System maintenance at the Joseph A. Rattigan Building in Santa Rosa (0000039816, due July 31, 2026), requiring Niagara-trained technicians and Class C-20 HVAC licensing. Northside Independent School District in San Antonio consolidated four expiring athletic equipment and supplies contracts into IFB2026137 (due October 19, 2026), though this opportunity does not align with the code's industrial control scope and signals misclassification in the procurement filing.