Informing Spectroscopists for Over 40 Years

Transmittance Standards

  • Hellma Analytics

    Hellma is the leading supplier of glass and quartz cuvettes, fiber optic probes and certified reference materials. Supporting UV/Vis, NIR, Raman, IR...

  • Starna Scientific Limited

    The Starna Group is the world’s leading supplier of Certified Reference Materials for UV-Visible and NIR spectrophotometry, spectrophotometer cells,...