Originally, Thermal Mass Flow Meters/Controllers were developped in the 1970's for gas vapour deposition in semiconductor fabrication processes. The Semicon market is still a huge market for suppliers of MFC's like Bronkhorst . By listening to the requirements from this market and introducing new and better products for gas, liquid and vapour delivery, Bronkhorst became a major supplier to the Semicon Industry. With metal sealed instruments, fast response MFC's, innovative direct liquid injection systems and on-board fieldbus interfaces (Profibus, DeviceNet, Modbus, etc.) Bronkhorst earned an excellent reputation within this highly advanced and demanding market.