UNSPSC 41181605: Immunonephelometer equipment

In this classification, Immunonephelometer equipment connotes a device used to that measures light scattering from antigen-antibody complexes. The concentration of these complexes may be measured by means of reflected light. A beam of light passed through a solution is scattered by the particles in suspension. The amount of light is detected by a photodetector, which converts light energy into electrical energy. The amount of electrical energy registers on a readout system such as a digital voltmeter or a recording chart.

This electrical readout is called the light-scattering value and is used to measure the concentration of antigen-antibody complexes. This generic type of device includes devices with various kinds of light sources, such as laser equipment. US FDA regulates Immunonephelometer equipment under 21 CFR 866.4540 and under FDA product code JZW.

UNSPSC 41181605 Immunonephelometer equipment is a Commodity code that in practice captures state and local procurement of specialized analytical and laboratory instruments—equipment for measuring chemical and biological constituents in water, air, and other samples—rather than immunonephelometers specifically. Recent state and local opportunities tagged under this code show a sharp divergence between the nominal scope and actual buying patterns: the code is being used to classify gas chromatographs, mass spectrometers, UV/Vis analyzers, rheometers, motion-capture systems, and water quality testing reagents with no connection to immunonephelometry. This mismatch reflects inconsistent tagging at the point of solicitation rather than any unified product family.

The issuing-body mix spans state health departments (Texas HHSC, Oregon DCBS, Michigan EGLE), county governments (Brazoria County, Broward County, Gwinnett County, Santa Clara County), cities (Philadelphia, Albuquerque), and higher-education institutions (Mississippi State University, University of Southern Mississippi, University of Wisconsin-Madison, Texas A&M). Mississippi State University dominates the recent activity, appearing across approximately fifteen separate sole-source notices for laboratory equipment replacements and new research instruments ranging from under $10,000 to $5.1 million. Geographic concentration is strongest in Mississippi (state and university procurements), Texas (county and university systems), Oregon (DCBS/OSHA laboratory operations), and Florida (Broward County). Recent representative opportunities include Texas HHSC's July 8, 2026 IFB for COLILERT reagents and water bottles (due July 15, 2026, $70,050–$90,000 annual range), Brazoria County's May 12, 2026 RFP for a complete liquid chromatograph–triple quadrupole mass spectrometer (due May 12, 2026, estimated $300,000), and Broward County's May 5, 2026 RFI contesting a proposed sole-source designation for Gas Chromatograph-Flame Ionization Detector maintenance (due May 13, 2026). The code shows little relevant recent activity—the opportunities are scattered across unrelated analytical instruments and reagents, with sole-source procurements (approximately 70 percent of the tagged notices) dominating the pipeline. Sole-source objection windows typically run 7–14 days from posting, and many procurements are research-driven equipment acquisitions at universities rather than state-agency operational spending.