Fully and semiautomatic Vickers-Knoop hardness testers have Windows® based operational and image analysis programs designed to automate the hardness calculation process. The testers accept loads from 1 g to 30 kg; focusing and patented load application is by means of a suspended motor and vibration-free hydraulic system producing perfect indentations. Large throat opening allows placement of large test samples for inspection. The testers have a simple straight-through illumination and optical system, eliminating alignment problems and high-power lighting. Three-position zoom optics provide a range of magnifications (100, 200 and 400°- or 200, 400 and 800°-) to meet all inspection requirements. www.navas-instruments.com