Versatile Aperture Options for Different Models – The DH?10 model includes a 21mm aperture; DH?12 comes with 21mm and 15mm apertures; DH?13 features 21mm, 15mm, and 12mm apertures. Choose the right model for your sample size requirements. Intuitive Touchscreen Operations – Responsive 2.8?inch colour touchscreen with 0.01 resolution simplifies control and provides clear data visualisation. User?friendly interface increases measurement efficiency. Dual Assurance for Long?Term Stability – Periodic self?checks in standby mode and a stable dual optical path work together to ensure consistent, reliable performance over time. Compact and Portable Design – Small, lightweight build allows easy transport. Measure haze and transmittance in multiple locations – from laboratory bench to production floor or field inspection. Broad Materials Compatibility – for testing glass, screen protectors, plastic panels, films, LCD screens, and other transparent or semi?transparent materials.