The 70682NS Reflectance/Transmittance Sphere has an 7 inch interior diameter for measurements of specular and diffuse hemispherical reflectance and total transmittance. The 70682NS uses a 8/D geometry (8 degree beam incidence/Diffuse collection) and is good for the UV-VIS-NIR regions. The sphere has 5 ports. An input port with 1.5 inch series male flange, a 1.0 Inch sample port, in-line with input port, a detector port with 1.5 inch series male flange, a 1.0 inch specular exclusion/inclusion port (for light trap or plug), and an additional 2.0 inch port at north pole for comparison measurement technique or center mounted samples. PTFE coated for a 250 to 2500 nm range.