The OXY Nor is a single channel module for measuring oxygen in land based aqua culture applications. It consists of a phase detection board for luminescence lifetime detection integrated in a 12 mm stainless steel fitting (length 106 mm). The small outer dimensions and low power consumption enable a simple integration into custom monitoring & control systems. As a digital interface it uses RS-485 Modbus RTU (option RS-485 ASCII proprietary). Also available with analog 4-20mA. A serial communication protocol is offered for data exchange between a PC or another host unit and the OXY Nor Unit.