Perten Instruments AB offers the DA 7300 in-line NIR process analyzer. The system is integrated with Siemens S7 using the built-in OPC server, with Schneider Electric systems through a direct connection to the SQL database, with RS-Linx using Allen-Bradley technology, and with other systems using dedicated protocols or 4-20 mA signals, according to the company. The system integration is a two-way communication where measured values, messages and camera images are transferred from the instrument to the system, and commands are send to the instrument.