Herberts Industrieglas GmbH & Co. KG is METAGLAS - safety sight glasses fused to metal for chemical processes and for sanitary CIP-/SIP applications. In the early 1980s years, the idea of creating a safe sight glass was developed by Herberts Industrieglas in close cooperation with the chemical companies Bayer, Hoechst and BASF. The result was a metal fused sight glass, METAGLAS. From now on, the sight glass was no longer a safety risk for the facilities. In the sequel, the glasses have been taken over in many company standards and standarised in the DIN7079. New application areas have been developed, such as chemical and pharamceutical industry, food industry, high pressure and vacuum applications, mining industry, measuring and control applications, petrochemistry et al. METAGLAS - the safe perspective became reality.