UNSPSC 32121800: Signal filters

Electronic circuits intended to remove signal noise or to enhance certain signal components

UNSPSC 32121800 Signal filters is a Class code that encompasses electrical protective relays, control components, and related signal-filtering equipment used in utility, water/wastewater, and infrastructure applications. State and local governments procure these items primarily for electrical system protection, SCADA integration, motor control, and automation functions across utility operations, municipal facilities, and transit systems. Recent solicitations show demand for specific relay models (such as SEL 451 and SEL 751 protection relays), ballasts and capacitors for facilities maintenance, Schneider Electric electrical components standardized for SCADA control panels, motor control centers, and related enclosures and solenoids for pump stations and water treatment facilities. Issuing bodies include utility authorities, county governments, school districts, and municipal water departments, with repeat activity from Hillsborough County and Bay and Kissimmee areas in Florida. The work spans equipment replacement (aging relay fleet modernization), new construction (motor control centers and lift station panels), and annual consumable supply agreements for ongoing maintenance and emergency operations.

Recent opportunities cluster in Florida and Texas. Kissimmee Utility Authority solicited SEL relays under sole-source procurement (IFB SS26054SH, due August 24, 2026) to replace aging protection relays throughout its electrical system with equipment fully compatible with existing SCADA infrastructure. Hillsborough County Board of County Commissioners issued two competitive sealed bids: ITB-26-00393 for pump station control panels and enclosures with an estimated contract value of $3.66 million over two years (due September 29, 2026, extended from September 22), and ITB-26-00277 for Schneider Electric electrical components at $519,787.19 over two years (due June 18, 2026). Northside Independent School District in San Antonio, Texas, posted an IFB for electronic equipment, parts, repairs, rentals, and services (IFB2026118, due September 24, 2026), replacing an expiring contract and warning vendors that failure to respond risks losing future business. Gwinnett County, Georgia, requested quotes for ballasts and capacitors for its Parks and Recreation Department on an annual contract basis (PA028-26, due June 12, 2026 at 3:00 p.m.). Trinity Metro in Tarrant County, Texas, sought an IDIQ electrical parts supplier to furnish materials for maintenance and emergency operations across facilities (IFB26T035, due August 20, 2026).