UNSPSC 41111973: Particle counter

A counter that measures the number of particles for extremely finite pulverulent body or makes comparative measurement that are found in liquid, such as working oil, ultra pure water and others.

UNSPSC 41111973 Particle counter is a Commodity code that encompasses laboratory and environmental monitoring instruments designed to detect and measure airborne particles, hazardous gases, and environmental conditions across water, wastewater, and air quality management operations. State and local governments procure particle counters, atmospheric monitoring sensors, environmental condition monitoring systems, and related analytical instrumentation primarily through environmental protection agencies, water utilities, and public health laboratories. The recent opportunities reveal that governments are buying complete monitoring systems—including sensors, controllers, alarms, calibration materials, and replacement parts—rather than standalone counters, with installation, training, commissioning, and long-term maintenance support bundled into awards. Issuing bodies include state environmental agencies (Illinois EPA, Georgia Department of Agriculture), municipal water and wastewater utilities (City of Phoenix Water Services Department), and regional public health or research institutions (Texas A&M University System, Clayton County Public Schools). Multi-year contracts with five-year terms are common, and vendors are expected to maintain local stock of replacement parts available within 24–72 hours and provide certified technician support.

Recent activity concentrates in the Southeast and Southwest. The Illinois EPA posted two atmospheric monitoring solicitations in August 2026—one for ozone transfer standards and zero air generators (IFB 26-532EPA-AIR53-B-53592, bids due August 27, 2026) and one for a tandem mass spectrometer for pesticide analysis (IFB 26-532EPA-LAB53-B-53209, bids due September 1, 2026). The City of Phoenix Water Services Department solicited fixed atmospheric monitoring instruments for gas detection at water and wastewater facilities under IFB-27-0435 (bids due September 4, 2026), requiring DBE-N compliance and product approval from manufacturers including ATI, De Nora, Drager, and MSA. The Georgia Department of Agriculture Laboratory Division issued an RFQ for environmental conditions monitoring systems covering fifty-eight critical laboratory units in Tifton and Atlanta (responses due August 21, 2026). Clayton County Public Schools in Georgia solicited musical equipment and sound systems under IFB 002-27 (bids due November 5, 2026), though this opportunity appears misaligned with the particle counter code's core scope. Domestic product preference and small business set-asides feature prominently in Illinois EPA procurements, while DBE participation requirements apply to Phoenix Water Services' solicitations.