glass filters

  1. Orbeco Analytical Systems, Inc.

    Orbeco-Hellige Inc. – Laboratory and Field Instruments and Reagents for Water Analysis

    Orbeco-Hellige is a leader in the fields of water and wastewater testing instruments, test kits and reagents for industry, public health, science and medicine, offering both portable and laboratory water analysis instruments for testing over 100 chemistries covering a broad range of applications for drinking water, wastewater and industrial/commercial process waters. Orbeco also manufactures specialized testers and test kits for ASTM petroleum/varnish color grading, ASTM concrete testing, soil testing, transparent liquids color grading.

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    8 months 2 weeks ago by cylex

  2. Custom Scientific Inc.

    Custom Scientific - Optical Filters, Optical Flats, Custom Optics

    We provide optical filters, optical flats and other high-quality custom optics, with specialization in astronomy filters.

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    8 months 3 weeks ago by ikm2