Kruss Professional Gemstone Refractometer

Kruss professional gemstone refractometer model ER601. This model features a larger ocular lens than the compact model for easier viewing of the scale. The lid is removeable for conducting spot readings. The polarizing filter is included. This model does not feature an integrated sodium filter or illumination. The optional light source KRT9A, the sodium filter KRT9B, and Refractometer liquid GT3 are sold separately on JTV.com.