UNSPSC 41112225: Resistance temperature detector RTD

A wire wound and thin film device that measures temperature using the physical principle of the positive temperature coefficient of electrical resistance of metals. The hotter they become, the larger or higher the value of their electrical resistance.

UNSPSC 41112225 Resistance temperature detector RTD (Commodity) covers resistance temperature detector sensors and related instrumentation components that state and local governments procure for water utilities, environmental monitoring, industrial facilities, and waste management infrastructure. Recent solicitations show state and local buyers acquiring RTD sensors as components within broader instrumentation packages for water treatment operations, wastewater systems, environmental monitoring networks, and waste-to-energy facilities. The City of Phoenix Water Services Department's five-year contract for pressure and temperature instrumentation equipment (IFB 26-0398) explicitly includes resistance temperature detectors alongside transmitters, switches, and related accessories for municipal water and wastewater treatment. The Texas Water Development Board's IFB for temperature sensors, cables, and mounting equipment (IFB ESBD_548214) and Gwinnett County Department of Water Resources' RFQ for vibration and temperature sensors at the Norcross Booster Station similarly embed RTD-class sensors within multi-sensor infrastructure procurements. Issuing bodies span water departments, county utilities, state environmental agencies, and special-purpose authorities managing waste and water infrastructure. Repeat institutional buyers include municipal water services departments and county water resource agencies.

Geographic activity concentrates in the Southeast and Southwest, with recent opportunities posted by Florida municipalities (City of Port Orange, City of Tampa, Solid Waste Authority of Palm Beach County), Georgia state and county agencies (Georgia Department of Agriculture Laboratory Division, Gwinnett County), Texas state water authorities (Texas Water Development Board), and Arizona municipal utilities (City of Phoenix). Representative opportunities include the City of Phoenix Water Services Department's August 2026 IFB for a five-year instrumentation supply contract covering RTD sensors and related equipment for water and wastewater facilities, with sealed offers due August 18, 2026; Gwinnett County Department of Water Resources' October 2026 RFQ for temperature sensors including PT100 RTD sensors for the Norcross Booster Station, with quotes due October 12, 2026; and the Texas Water Development Board's August 2026 IFB for temperature sensors and related equipment, with bids due August 25, 2026. The Georgia Department of Agriculture Laboratory Division's August 2026 RFQ for environmental monitoring systems to replace aging equipment in laboratory facilities across Tifton and Atlanta also specifies temperature monitoring as a core requirement.